Numbers 19:1-10 · Bible study
Numbers 19:1-10 Commentary: Red Heifer Ashes
Hebrew · 11 what the commentators say
Meaning in one sentence
Why God gave the red heifer ritual after Korah's rebellion, and how its ashes cleansed Israel from the defilement of death.
Research Summary
- Meaning: The ashes of a red heifer, mixed with water, cleansed Israelites from the defilement caused by contact with a dead body, restoring them to the community of worship.
- Key words: “Red heifer” (פָּרָה אֲדֻמָּה, parah adummah), “without spot” (תְּמִימָה, temimah, perfect), “water of separation” (מֵי נִדָּה, mei niddah, water of impurity/cleansing), “sin offering” (חַטָּאת, hattat).
- Main debate: Why the red color? Some see an apologetic against Egyptian bull worship (Jamieson-Fausset-Brown); others see a symbolic connection to blood or to the “red earth” of humanity (Barnes). No single explanation dominates.
- Theological theme: The gravity of death as the result of sin; the need for a divinely appointed means of cleansing that points forward to Christ’s once-for-all sacrifice (Hebrews 9).
- Best use: As a background text for explaining the need for purification from sin and death, and as a type of Christ in a series on Old Testament sacrifices.
Translation Comparison
BSB Berean Standard Bible 2020
1Then the LORD said to Moses and Aaron,
2“This is the statute of the law that the LORD has commanded: Instruct the Israelites to bring you an unblemished red heifer that has no defect and has never been placed under a yoke.
3Give it to Eleazar the priest, and he will have it brought outside the camp and slaughtered in his presence.
4Eleazar the priest is to take some of its blood on his finger and sprinkle it seven times toward the front of the Tent of Meeting.
5Then the heifer must be burned in his sight. Its hide, its flesh, and its blood are to be burned, along with its dung.
6The priest is to take cedar wood, hyssop, and scarlet wool and throw them onto the burning heifer.
7Then the priest must wash his clothes and bathe his body in water; after that he may enter the camp, but he will be ceremonially unclean until evening.
8The one who burned the heifer must also wash his clothes and bathe his body in water, and he too will be ceremonially unclean until evening.
9Then a man who is ceremonially clean is to gather up the ashes of the heifer and store them in a ceremonially clean place outside the camp. They must be kept by the congregation of Israel for preparing the water of purification; this is for purification from sin.
10The man who has gathered up the ashes of the heifer must also wash his clothes, and he will be ceremonially unclean until evening. This is a permanent statute for the Israelites and for the foreigner residing among them.
WEB World English Bible 2000
1Yahweh spoke to Moses and to Aaron, saying,
2“This is the statute of the law which Yahweh has commanded. Tell the children of Israel to bring you a red heifer without spot, in which is no defect, and which was never yoked.
3You shall give her to Eleazar the priest, and he shall bring her outside of the camp, and one shall kill her before his face.
4Eleazar the priest shall take some of her blood with his finger, and sprinkle her blood toward the front of the Tent of Meeting seven times.
5One shall burn the heifer in his sight; her skin, and her meat, and her blood, with her dung, shall he burn.
6The priest shall take cedar wood, hyssop, and scarlet, and cast it into the middle of the burning of the heifer.
7Then the priest shall wash his clothes, and he shall bathe his flesh in water, and afterward he shall come into the camp, and the priest shall be unclean until the evening.
8He who burns her shall wash his clothes in water, and bathe his flesh in water, and shall be unclean until the evening.
9“A man who is clean shall gather up the ashes of the heifer, and lay them up outside of the camp in a clean place; and it shall be kept for the congregation of the children of Israel for use in water for cleansing impurity. It is a sin offering.
10He who gathers the ashes of the heifer shall wash his clothes, and be unclean until the evening. It shall be to the children of Israel, and to the stranger who lives as a foreigner among them, for a statute forever.
KJV King James Version 1769
1And the Lord spake unto Moses and unto Aaron, saying,
2This is the ordinance of the law which the Lord hath commanded, saying, Speak unto the children of Israel, that they bring thee a red heifer without spot, wherein is no blemish, and upon which never came yoke:
3And ye shall give her unto Eleazar the priest, that he may bring her forth without the camp, and one shall slay her before his face:
4And Eleazar the priest shall take of her blood with his finger, and sprinkle of her blood directly before the tabernacle of the congregation seven times:
5And one shall burn the heifer in his sight; her skin, and her flesh, and her blood, with her dung, shall he burn:
6And the priest shall take cedar wood, and hyssop, and scarlet, and cast it into the midst of the burning of the heifer.
7Then the priest shall wash his clothes, and he shall bathe his flesh in water, and afterward he shall come into the camp, and the priest shall be unclean until the even.
8And he that burneth her shall wash his clothes in water, and bathe his flesh in water, and shall be unclean until the even.
9And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place, and it shall be kept for the congregation of the children of Israel for a water of separation: it is a purification for sin.
10And he that gathereth the ashes of the heifer shall wash his clothes, and be unclean until the even: and it shall be unto the children of Israel, and unto the stranger that sojourneth among them, for a statute for ever.
ASV American Standard Version 1901
1And Jehovah spake unto Moses and unto Aaron, saying,
2This is the statute of the law which Jehovah hath commanded, saying, Speak unto the children of Israel, that they bring thee a red heifer without spot, wherein is no blemish, and upon which never came yoke.
3And ye shall give her unto Eleazar the priest, and he shall bring her forth without the camp, and one shall slay her before his face:
4and Eleazar the priest shall take of her blood with his finger, and sprinkle her blood toward the front of the tent of meeting seven times.
5And one shall burn the heifer in his sight; her skin, and her flesh, and her blood, with her dung, shall he burn:
6and the priest shall take cedar-wood, and hyssop, and scarlet, and cast it into the midst of the burning of the heifer.
7Then the priest shall wash his clothes, and he shall bathe his flesh in water, and afterward he shall come into the camp, and the priest shall be unclean until the even.
8And he that burneth her shall wash his clothes in water, and bathe his flesh in water, and shall be unclean until the even.
9And a man that is clean shall gather up the ashes of the heifer, and lay them up without the camp in a clean place; and it shall be kept for the congregation of the children of Israel for a water for impurity: it is a sin-offering.
10And he that gathereth the ashes of the heifer shall wash his clothes, and be unclean until the even: and it shall be unto the children of Israel, and unto the stranger that sojourneth among them, for a statute for ever.
YLT Young's Literal Translation 1898
1And Jehovah speaketh unto Moses, and unto Aaron, saying,
2`This is a statute of the law which Jehovah hath commanded, saying, Speak unto the sons of Israel, and they bring unto thee a red cow, a perfect one, in which there is no blemish, on which no yoke hath gone up;
3and ye have given it unto Eleazar the priest, and he hath brought it out unto the outside of the camp, and hath slaughtered it before him.
4`And Eleazar the priest hath taken of its blood with his finger, and hath sprinkled over-against the front of the tent of meeting of her blood seven times;
5and one hath burnt the cow before his eyes; her skin, and her flesh, and her blood, besides her dung, he doth burn;
6and the priest hath taken cedar wood, and hyssop, and scarlet, and hath cast unto the midst of the burning of the cow;
7and the priest hath washed his garments, and hath bathed his flesh with water, and afterwards doth come in unto the camp, and the priest is unclean till the evening;
8and he who is burning it doth wash his garments with water, and hath bathed his flesh with water, and is unclean till the evening.
9`And a clean man hath gathered the ashes of the cow, and hath placed at the outside of the camp, in a clean place, and it hath become to the company of the sons of Israel a charge for waters of separation--it is a cleansing ;
10and he who is gathering the ashes of the heifer hath washed his garments, and is unclean till the evening; and it hath been to the sons of Israel, and to the sojourner who is sojourning in their midst, for a statute age-during.
Darby Darby Bible 1890
1And Jehovah spoke to Moses and to Aaron, saying,
2This is the statute of the law which Jehovah hath commanded, saying, Speak unto the children of Israel, that they bring thee a red heifer without blemish, wherein is no defect, and upon which never came yoke;
3and ye shall give it to Eleazar the priest, and he shall bring it outside the camp, and one shall slaughter it before him.
4And Eleazar the priest shall take of its blood with his finger, and shall sprinkle of its blood directly before the tent of meeting seven times.
5And one shall burn the heifer before his eyes; its skin and its flesh, and its blood, with its dung, shall he burn.
6And the priest shall take cedar-wood, and hyssop, and scarlet, and cast them into the midst of the burning of the heifer.
7And the priest shall wash his garments, and he shall bathe his flesh in water, and afterwards he shall come into the camp; and the priest shall be unclean until the even;
8and he that hath burned it shall wash his garments in water, and bathe his flesh in water, and shall be unclean until the even.
9And a clean man shall gather the ashes of the heifer, and deposit them outside the camp in a clean place, and it shall be kept for the assembly of the children of Israel for a water of separation: it is a purification for sin.
10And he that hath gathered the ashes of the heifer shall wash his clothes, and be unclean until the even. And it shall be unto the children of Israel, and unto the stranger that sojourneth among them, an everlasting statute.
Douay-Rheims Douay-Rheims Bible 1899
1And the Lord spoke to Moses and Aaron, saying:
2This is the observance of the victim, which the Lord hath ordained. Command the children of Israel, that they bring unto thee a red cow of full age, in which there is no blemish, and which hath not carried the yoke:
3And you shall deliver her to Eleazar the priest, who shall bring her forth without the camp, and shall immolate her in the sight of all:
4And dipping his finger in her blood, shall sprinkle it over against the door of the tabernacle seven times,
5And shall burn her in the sight of all delivering up to the fire her skin, and her flesh, and her blood, and her dung.
6The priest shall also take cedar wood, and hyssop, and scarlet twice dyed, and cast it into the flame, with which the cow is consumed.
7And then after washing his garments, and body, he shall enter into the camp, and shall be unclean until the evening.
8He also that hath burned her, shall wash his garments, and his body, and shall be unclean until the evening.
9And a man that is clean shall gather up the ashes of the cow, and shall pour them forth without the camp in a most clean place, that they may be reserved for the multitude of the children of Israel, and for a water of aspersion: because the cow was burnt for sin.
10And when he that carried the ashes of the cow, hath washed his garments, he shall be unclean until the evening. The children of Israel, and the strangers that dwell among them, shall observe this for a holy thing by a perpetual ordinance.
Verse in Context
Original Language (Biblical Hebrew)
Old Testament · Biblical Hebrew · Numbers 19:1
Source: STEPBible TAGNT/TEHB (CC-BY 4.0). Click or tap a morphology code to see the full parsing.
Scholars' Consensus
Commentators agree that Numbers 19:1-10 institutes a unique purification ritual for the strongest form of defilement in Israel: contact with death. Keil and Delitzsch observe that death, as the manifestation and consequence of sin (Genesis 2:17), required cleansing beyond ordinary washings. The red heifer was a sin offering (v.9), yet its complete burning outside the camp and the preservation of its ashes for mixing with water set it apart from all other sacrifices. Calvin notes that the priest and the one who burned the heifer became unclean until evening, a paradox meant to impress upon Israel the gravity of sin. Barnes adds that the defilement was transferred to the victim, and even its ashes retained that contagion, so that the one who gathered them also became unclean. This ritual was provided at public expense (Jamieson-Fausset-Brown), underscoring its importance for the whole community. Hebrews 9:13-14, referenced by Adam Clarke, explicitly connects the ashes of a heifer sprinkling the unclean to the blood of Christ, which purifies the conscience from dead works.
How settled is the interpretation?
Interpretive difficulty: Medium
Main views:
- Typological/Christological view: Hebrews 9:13-14; the heifer’s perfection, freedom from the yoke, and burning outside the camp parallel Christ’s sinlessness and crucifixion outside Jerusalem (John 19:17, Hebrews 13:12).
- Historical/situational view: The ritual is given directly after the plague of Korah (Numbers 16) to address the widespread defilement from corpses. The chapter’s position in the narrative points to a practical, contextual need.
- Symbolic/ceremonial view: The red color, scarlet thread, cedar, and hyssop have symbolic meanings (blood, durability, cleansing) that align with broader ancient Near Eastern purification rites, but the primary function is to maintain ritual holiness in the camp.
What is clear: The ashes of the red heifer, mixed with water, provided a divinely ordained means of ritual purification for those who had become defiled by contact with a dead body, restoring them to the community of worship.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| The significance of the red color | All commentators note that this is the only case in the law where the color of the victim is specified. The red color is widely seen as symbolic of blood and purification. | Some (Jamieson-Fausset-Brown) connect it to an anti-Egyptian polemic, as Egyptians sacrificed red bulls to Typhon. Others (Barnes, Matthew Henry) link it to the 'red earth' of Adam or to blood as the life-giving and purifying agent. No consensus on a single intended meaning. |
| Why Eleazar rather than Aaron performs the ritual | All note that Eleazar (the deputy high priest) performed the ritual instead of Aaron to avoid defiling the high priest with temporary uncleanness. | Wesley and Gill stress that this preserved Aaron for his ongoing holy ministry; others (Barnes) add that the high priest’s exemption from this duty reinforces the unique seriousness of the death-defilement. The precise reason for the defilement’s transfer is assumed but not fully explained. |
| Typological relationship to Christ | The majority of Christian commentators (Clarke, Calvin, Matthew Henry, Jamieson-Fausset-Brown) see the red heifer as a type of Christ’s atoning sacrifice, drawing on Hebrews 9:13-14. | Some emphasize the heifer’s unblemished condition and freedom from the yoke as pointing to Christ’s sinlessness. Others (Keil & Delitzsch, in a more restrained manner) focus on the ritual’s function within ancient Israel without extensive typology. The degree of typological correspondence is debated. |
| The nature of uncleanness: moral or ceremonial | All agree that the uncleanness from the dead is ceremonial, not moral, touching a corpse does not imply personal sin, but it disqualifies one from worship. | Some commentators (Calvin, Gill) stress that this ceremonial defilement symbolizes the deeper reality of sin’s pollution, making the ritual a moral lesson. Others (Barnes, Keil & Delitzsch) emphasize the ritual’s place in maintaining the holiness of the tabernacle and the camp as a physical space for God’s presence, without reducing it to a mere symbol. |
| Application to the stranger (foreigner) | All note that verse 10 includes the stranger residing among them, making this a statute that applies to both Israelite and non-Israelite within the covenant community. | The precise obligations of the stranger in other ritual matters vary, but here the law is clear: the outsider is subject to the same purification requirements and benefits as the native-born. This is consistent with the principle that the land and the tabernacle’s holiness affected all residents. |
Historical & Cultural Context
Numbers 19 follows immediately after the rebellion of Korah (Numbers 16) and the subsequent plague that killed 14,700 people (Numbers 16:49). That catastrophic event left the camp saturated with corpses. According to Numbers 17:12-13, the people cried out, “Everyone who comes near to Yahweh’s tabernacle dies! Will we all perish?” The law of the red heifer answers that cry. It provides a standing provision for cleansing anyone defiled by contact with a dead body, a common occurrence in a wilderness camp where death struck often.
The ritual is assigned to Eleazar, the deputy high priest, not to Aaron. Gill and Wesley note that this spared Aaron from even temporary defilement, preserving the high priest’s ceremonial integrity. The heifer was to be slaughtered “outside the camp” (v.3). Barnes explains that the defilement was viewed as transferred to the victim, so the victim, like the defiled persons, had to be removed from the camp. This location later became a powerful type of Christ’s crucifixion “outside the gate” (Hebrews 13:12).
The color red has drawn various explanations. Jamieson-Fausset-Brown mention a possible contrast to the Egyptian practice of offering a red bull to Typhon; others, like Matthew Henry, see red as a fit colour to shadow forth the bloody nature of sin and the blood of Christ. The heifer’s freedom from the yoke (v.2) corresponds to Deuteronomy 21:3, where a heifer that has never been yoked purifies an unsolved murder, a further link between death and the need for atonement. The inclusion of the “stranger who sojourns among them” (v.10) shows that the provision extended to non-Israelites living within the covenant community, making the water of separation available to all who dwelt in the land.
Textual Notes
The supplied sources note no significant textual variants in Numbers 19:1-10. The Hebrew text is stable across manuscripts. The main translational difference is the rendering of the phrase mei niddah (מֵי נִדָּה): the WEB translates “water for cleansing impurity,” the KJV has “water of separation,” and the BSB uses “water of purification.” The Cambridge Bible notes that the LXX translates niddah as hagnisma (ἅγνισμα, “sanctification/cleansing”), which the Vulgate follows. These variations reflect the same underlying Hebrew term and do not affect the meaning of the passage.
Reception History
Numbers 19:1-10 received its most influential interpretation in the New Testament book of Hebrews. Hebrews 9:13-14 draws a contrast: the ashes of a heifer sanctify “to the purifying of the flesh,” but the blood of Christ cleanses the conscience from dead works to serve the living God. This established the red heifer as a type of Christ’s superior sacrifice. Early church fathers such as Justin Martyr and Tertullian referred to this passage to argue for the efficacy of Christ’s blood over Levitical rituals. In medieval Jewish tradition, the red heifer was considered one of the chukkim, divine decrees whose full rationale lies beyond human understanding, yet whose observance was essential for the restoration of temple worship. The Talmud (Mishnah Parah) devotes an entire tractate to the regulations for preparing the ashes. During the Reformation, Calvin and Wesley emphasized the paradox of the priests becoming unclean, using it to highlight the imperfection of the Old Covenant and the need for a better high priest. In modern times, the red heifer has gained renewed attention among groups preparing for a future Jewish temple, who seek to breed a red heifer according to this statute.
Preaching This Verse
Three-point outline
- The Gravity of Death and Defilement, The plague of Korah showed that rebellion against God brings death, and death itself defiles. The red heifer ritual teaches that even accidental contact with death requires cleansing. This points to the seriousness of sin and its ultimate consequence.
- A Sin Offering that Becomes a Cleansing Water, Unlike other sacrifices, the red heifer was completely burned, and its ashes were preserved and mixed with water to make a “water of separation” (v.9). This water could be used repeatedly for ongoing purification. It prefigures Christ’s one sacrifice that continually cleanses believers from sin.
- Clean People Handling Unclean Things, The priest, the burner, and the gatherer all became unclean until evening. Even the man who gathered the ashes was defiled. This paradox (Calvin) stresses that sin and death are so corrupting that any contact with them, even in the act of cleansing, leaves a mark. Only something greater than the system could fully remove the stain.
Five-point outline
- The Provider: God gives a statute of the law (vv.1-2), The ritual is initiated by Yahweh, not by human invention.
- The Victim: A red heifer, unblemished, never yoked (v.2), The animal’s perfection and freedom mirror the spotless Christ, who was “without sin” (Hebrews 4:15).
- The Location: Outside the camp (v.3), A place of execution and exclusion, later fulfilled in Jesus’ crucifixion.
- The Process: Blood sprinkled seven times, the heifer burned with cedar, hyssop, and scarlet (vv.4-6), These elements reappear in the purification of a leper (Leviticus 14:6), linking cleansing from death with cleansing from disease.
- The Product: Ashes stored for a water of purification (vv.9-10), A permanent provision for ongoing uncleanness, showing that God makes a way for his people to remain in his presence despite their inevitable contact with a fallen world.
Illustration hooks
- When a family loses a loved one, grief is real, but in ancient Israel there was also a concrete barrier: you could not enter the tabernacle for seven days. How do we handle the lingering sense of distance from God after tragedy? The ashes of the heifer were a tangible reminder that God had provided a way back.
- A job that involves cleaning up hazardous waste, the workers wear protective gear, but even then, some contamination is unavoidable, and decontamination procedures are strict. The red heifer ritual worked like that: even the priests who performed it were “contaminated” by their service, underscoring the power of death.
- Consider a communal tragedy like a natural disaster that leaves many bodies to be buried. The law of the red heifer was given at a time when the camp was full of corpses. It provided a standardized, God-given method for the whole community to be restored to worship.
Questions your congregation is asking
- Does this Old Testament ritual have any meaning for Christians today, or is it just an obsolete law?
- What does it mean that even the clean man who gathered the ashes became unclean? How does that relate to Jesus’ work?
- Why does God command a “water of separation” for handling death? What does that tell us about how he views death?
Leading a Discussion
Numbers 19:1-10 can feel distant, a complicated ritual about ashes and dead bodies. But it was given at a moment when the people of Israel were surrounded by death after Korah’s rebellion. The chapter addresses a deep human question: how can we approach a holy God when we are constantly touched by a world of sin and death? As you discuss these verses, notice the careful detail and the feeling of paradox, the very thing that brings cleansing also defiles those who handle it. Let that tension lead you to appreciate the work of Christ.
Discussion questions
- What does the requirement that the heifer be “unblemished” and “never yoked” tell you about the character of the offering? Why do you think God specified a red cow?
- Why was the heifer slaughtered and burned “outside the camp” (v.3)? How does this location compare to what Hebrews 13:12 says about Jesus?
- In verses 7-8, both the priest and the one who burns the heifer become unclean until evening. Why would a ritual that removes uncleanness also make its ministers unclean? What does this teach about sin and death?
- Verse 9 calls the ashes “a sin offering.” In what sense can wood, hyssop, and scarlet thrown into a fire become part of the offering? What does that suggest about how God uses ordinary things for holy purposes?
- The water made from the ashes is called “water of separation” (mei niddah). How does this water function differently from other washings in the law (like those for lepers or for ordinary impurities)?
- Why do you think this statute is given “forever” and also includes “the stranger who sojourns among them” (v.10)? What does that reveal about God’s heart for outsiders?
- Hebrews 9:13-14 says that the ashes of a heifer “sanctify to the purifying of the flesh,” but the blood of Christ purifies the conscience. What difference does that make when you think about your own sense of guilt before God?
Word Study
The key original-language words in this verse. Select any word for its full lexicon entry — meaning, every occurrence in Scripture, and related words.
Cross-References
Source: Treasury of Scripture Knowledge (TSK, public domain)
| Exodus 12:5 | Your lamb shall be without defect, a male a year old. You shall take it from the sheep or from the goats. |
| Leviticus 14:6 | As for the living bird, he shall take it, the cedar wood, the scarlet, and the hyssop, and shall dip them and the living bird in the blood of the bird that was killed over the running water. |
| Leviticus 22:20 | But you shall not offer whatever has a defect, for it shall not be acceptable for you. |
| Leviticus 22:21 | Whoever offers a sacrifice of peace offerings to Yahweh to accomplish a vow, or for a free will offering of the herd or of the flock, it shall be perfect to be accepted. It shall have no defect. |
| Leviticus 22:25 | You must not offer any of these as the bread of your God from the hand of a foreigner, because their corruption is in them. There is a defect in them. They shall not be accepted for you.’” |
| Numbers 31:21 | Eleazar the priest said to the men of war who went to the battle, “This is the statute of the law which Yahweh has commanded Moses. |
| Deuteronomy 21:3 | It shall be that the elders of the city which is nearest to the slain man shall take a heifer of the herd, which hasn’t been worked with and which has not drawn in the yoke. |
| I Samuel 6:7 | “Now therefore take and prepare yourselves a new cart and two milk cows on which there has come no yoke; and tie the cows to the cart, and bring their calves home from them; |
Interlinear and lexical data from STEPBible (CC BY 4.0). Cross-reference data from OpenBible.info (CC BY 4.0). Commentaries are public domain.
For personal reflection
Read the devotional page — prayer, application, and "for families"
What the Commentators Say
11 public-domain commentaries, condensed into plain language.
Adam Clarke's Commentary Methodist/Wesleyan 1826
Clarke reads the red heifer as a direct contrast to Egyptian worship: a female sacrifice where males were normal, and a red heifer offered against the Egyptian goddess Isis and the evil demon Typhon. He sees this rite as a clear type of Christ's sacrifice, noting the animal had to be spotless, blemish-free, and never yoked.
Barnes' Notes on the Bible Protestant 1832
Barnes reads the red heifer ritual as an adapted ancient custom, not a new law. He points out that its red color symbolizes man's earthly body, taken from the red earth of Adam's creation. For Barnes the key typological point is that the heifer, bearing transferred defilement, was killed outside the camp, prefiguring Christ cut off from the theocracy and crucified outside Jerusalem among sinners.
Calvin's Commentaries Reformed 1564
Calvin emphasizes that this ritual taught Israel a humbling truth: people cannot cleanse themselves from impurity. Purification must come from outside, from the sanctuary and its sacrifice. The ceremony pointed forward to Christ, who bore the curse for sin yet remained perfectly holy, the true source of cleansing.
Cambridge Bible for Schools and Colleges Anglican 1880
The full-grown cow (the usual Hebrew term) was selected; the exact reason for the red color is unknown, though both the red hide and the scarlet thread may point to blood purification. The burnt cow is called a sin-offering, but since the ashes are the main focus, the Hebrew word is understood in a general sense of "something that removes impurity."
Geneva Bible Notes Reformed 1599
The Geneva Notes emphasize the precise ceremonial requirements: the red heifer must be flawless, never yoked, slain outside the camp, and its blood sprinkled seven times toward the tabernacle. They identify the ashes mixed with water as a sin offering for purification, noting that every person involved in the ritual becomes ceremonially unclean until evening, underscoring the transfer of impurity.
Gill's Exposition of the Bible Baptist 1748
Gill treats the red heifer ritual as a deliberate type of Christ's sacrifice. Every detail -- the red colour, the spotlessness, the never-yoked condition -- was designed to foreshadow the person and sufferings of Jesus. He also stresses this law was given at Sinai, not invented later as a response to later events.
Jamieson-Fausset-Brown Commentary Protestant 1871
Jamieson, Fausset and Brown see the choice of a red heifer as a deliberate correction of Egyptian superstition, since Egyptians offered red bulls to their evil being Typhon. The priest Eleazar performed the rite instead of the high priest to avoid defilement, and the sprinkling toward the tabernacle showed this was an expiatory sacrifice.
Keil & Delitzsch OT Commentary Protestant 1876
Keil-Delitzsch stresses that the red heifer was not a normal sin-offering for forgiveness but a unique provision to create an antidote against death's defilement. Its female sex, red colour, and untamed strength all symbolised life at its fullest, making it a powerful reagent to counteract the corruption of death.
Lange's Commentary Reformed 1857
Lange insists on a sharp distinction between death itself, which is pure and purifying, and corpses, which are physically unclean and even poisonous. The red heifer ritual provides an antidote: an elixir of life from the most perfect form of life to counteract the defiling effects of dead matter.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Matthew Henry draws a sharp contrast between the law and the gospel. The ashes of the red heifer made a purifying water, not a beautifying one. For him, this shows the law's limit: it could cleanse from defilement but could not adorn the soul as the gospel does.
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley draws a detailed typology: the red heifer's blood prefigures Christ's sacrificial blood for sin, and burning it outside the camp points to Christ suffering outside the city. He notes that Eleazar performed this task rather than Aaron because it caused ceremonial uncleanness, emphasizing Christ's voluntary bearing of our defilement.