Isaiah 58:5 · Bible study
Isaiah 58:5 Commentary: The Fast God Rejects
Hebrew · 9 what the commentators say
Meaning in one sentence
Why does God dismiss outward acts of fasting? This study examines the true fast He desires, one of justice and mercy, not empty ritual.
Research Summary
- Meaning: Outward religious rituals without inward humility and social justice are rejected by God.
- Key words: “afflict his soul” (H6031, H5315), “bend down” (H3721), “bulrush” (H0100), “sackcloth and ashes” (H8242, H0665), “acceptable” (H7522).
- Main debate: Whether physical fasting is set aside entirely or must be accompanied by justice; most commentators affirm the latter.
- Theological theme: The priority of mercy over sacrifice (cf. Hos 6:6; Matt 9:13); true worship is ethical, not merely liturgical.
- Best use: A corrective for any religious practice that hides a disobedient heart, applicable to fasting, giving, prayer, and service.
Translation Comparison
BSB Berean Standard Bible 2020
Is this the fast I have chosen: a day for a man to deny himself, to bow his head like a reed, and to spread out sackcloth and ashes? Will you call this a fast and a day acceptable to the LORD?
WEB World English Bible 2000
Is this the fast that I have chosen? A day for a man to humble his soul? Is it to bow down his head like a reed, and to spread sackcloth and ashes under himself? Will you call this a fast, and an acceptable day to Yahweh?
KJV King James Version 1769
Is it such a fast that I have chosen? a day for a man to afflict his soul? is it to bow down his head as a bulrush, and to spread sackcloth and ashes under him? wilt thou call this a fast, and an acceptable day to the Lord?
ASV American Standard Version 1901
Is such the fast that I have chosen? the day for a man to afflict his soul? Is it to bow down his head as a rush, and to spread sackcloth and ashes under him? wilt thou call this a fast, and an acceptable day to Jehovah?
YLT Young's Literal Translation 1898
Like this is the fast that I choose? The day of a man's afflicting his soul? To bow as a reed his head, And sackcloth and ashes spread out? This dost thou call a fast, And a desirable day--to Jehovah?
Darby Darby Bible 1890
Is such the fast that I have chosen, a day for a man to afflict his soul, — that he should bow down his head as a bulrush, and spread sackcloth and ashes [under him]? Wilt thou call this a fast, and a day acceptable to Jehovah?
Douay-Rheims Douay-Rheims Bible 1899
Is this such a fast as I have chosen: for a man to afflict his soul for a day? is this it, to wind his head about like a circle, and to spread sackcloth and ashes? wilt thou call this a fast, and a day acceptable to the Lord?
Translations in other languages (10 available)
¿ Es tal el ayuno que yo escogí, que de día aflija el hombre su alma, que encorve su cabeza como junco, y haga cama de saco y de ceniza? ¿ Llamaréis esto ayuno, y día agradable á Jehová?
Seria este o jejum que eu escolheria, que o homem um dia aflija sua alma, incline sua cabeça como o junco, e estenda debaixo de si saco e cinza? Chamarias tu a isto jejum e dia agradável ao SENHOR?
Est-ce là le jeûne auquel je prends plaisir,
Sollte das ein Fasten sein, das ich erwählen soll, daß ein Mensch seinem Leibe des Tages übel tue oder seinen Kopf hänge wie ein Schilf oder auf einem Sack und in der Asche liege? Wollt ihr das ein Fasten nennen und einen Tag, dem HERRN angenehm?
Zou het zulk een vasten zijn, dat Ik verkiezen zou, dat de mens zijn ziel een dag kwelle, dat hij zijn hoofd kromme gelijk een bieze, en een zak en as onder zich spreide? Zoudt gij dat een vasten heten, en een dag den HEERE aangenaam?
E’ questo il digiuno di cui io mi compiaccio? il giorno in cui l’uomo affligge l’anima sua? Curvar la testa come un giunco, sdraiarsi sul sacco e sulla cenere, è egli questo che tu chiami un digiuno, un giorno accetto all’Eterno?
Izali to jest takowy post, jakim obrał, a dzień, w któryby trapił człowiek duszę swoję? żeby zwiesił jako sitowie głowę swoję, a wór i popiół sobie podścielał? Toż to nazwiesz postem, i dniem przyjemnym Panu?
Таков ли тот пост, который Я избрал, день, в который томит человек душу свою, когда гнет голову свою, как тростник, и подстилает под себя рубище и пепел? Это ли назовешь постом и днем, угодным Господу?
這樣 禁食 豈是 我所揀選、使人 刻苦 己心 的日子嗎？豈是叫人垂 頭 像葦子，用麻布 和爐灰 鋪在他以下嗎？你這 可稱為 禁食、為耶和華 所悅納 的日子嗎？
Have I given orders for such a day as this? a day for keeping yourselves from pleasure? is it only a question of the bent head, of putting on haircloth, and being seated in the dust? is this what seems to you a holy day, well-pleasing to the Lord?
Verse in Context
Original Language (Biblical Hebrew)
Old Testament · Biblical Hebrew · Isaiah 58:5
Source: STEPBible TAGNT/TEHB (CC-BY 4.0). Click or tap a morphology code to see the full parsing.
Scholars' Consensus
Commentators across traditions agree that this verse does not condemn fasting itself, but rather the hypocritical performance of religious duties without genuine heart change. Barnes notes that the pain of abstinence is not meritorious; God aims at justice, truth, and holiness (Isa 58:6-7). Keil and Delitzsch describe the people’s “work-holy delusion”, a self-righteous assumption that outward gestures earn divine favor. Gill emphasizes that bowing the head like a reed and lying on sackcloth and ashes are merely “dumb signs” if not accompanied by humility before God and love for neighbor. JFB adds that the goal is not to “appear to men to fast” (cf. Matt 6:17-18). All agree: external rituals without inward transformation and social righteousness are unacceptable to God.
How settled is the interpretation?
Interpretive difficulty: Low
What is clear: God rejects a fast that is only external show, without humility toward Him and justice toward others.
What Scholars Agree and Debate
| Topic | Agreed | Debated |
|---|---|---|
| The role of physical acts in fasting | External acts alone, bowing, sackcloth, ashes, do not constitute an acceptable fast. | Some Christians see this as a call to abolish physical fasting entirely (focusing only on justice). Others, drawing on Matthew 6:16-18 and the example of Jesus, maintain that fasting remains valuable when paired with genuine humility and charity. |
| The relationship between ritual and righteousness | God desires a heart that leads to just treatment of others, not mere ritual observance. | Evangelical traditions often emphasize inner conversion that then produces social action; Catholic and Orthodox traditions see the sacraments and fasting as means of grace that should bear fruit in works of mercy, both are needed. |
| What constitutes an acceptable fast | True fasting includes compassion for the poor and oppressed (vv. 6-7). | Some interpret the passage literally: only the ethical actions described in vv. 6-7 are the “fast.” Others treat those actions as the outcome of true fasting, not the definition itself. |
Historical & Cultural Context
Isaiah 58 belongs to the post-exilic period (chapters 56-66), when the returned community struggled to rebuild both the temple and a faithful identity. The only fast prescribed by the Law was the Day of Atonement (Lev 16:29, 23:27,32), a day to “afflict your souls.” But by this time, the people had added many voluntary fasts, especially during times of crisis (2 Chron 20:3; Ezra 10:6; Nehemiah 9:1-2). They believed these extra fasts were meritorious and expected God to reward them.
Yet their practice was corrupt. While fasting, they continued to “find pleasure” (v.3), oppress workers, quarrel and strike with their fists (v.4). The outward signs, bowing the head, wearing sackcloth, spreading ashes, were the traditional marks of mourning and repentance (1 Kings 21:27; Esther 4:3; Nehemiah 9:1). But these gestures had become a hollow show. The word for “spread” (יצע, yatsa) in the Hiphil means to lay out a bed carefully, implying a staged performance. The prophet’s series of rhetorical questions (introduced by the Hebrew particle הֲ, ha) exposes the absurdity of calling such empty display “a fast and an acceptable day to Yahweh.” God does not want actors; He wants a people whose worship matches their lives.
Textual Notes
The consulted sources note no significant textual variants for this verse. The Hebrew text is stable across manuscripts. Some translations render “spread” (Hiphil of יָצַע) as “lay down” or “spread under,” but the meaning is consistent.
Reception History
This verse has been used throughout church history to challenge empty religiosity. Early Christian writers, such as Tertullian and Augustine, cited it to argue that fasting must be accompanied by almsgiving, a connection that became formal in the ancient church (Keil mentions a law requiring alms with fasting). In the Reformation, both Luther and Calvin used this text to critique the idea of earning grace through works. Modern liberation theology reads it as a call for structural justice, while conservative interpreters stress personal repentance that results in charitable action. Across centuries, Isaiah 58:5 has reminded believers that God sees through the outward form to the condition of the heart.
Preaching This Verse
Three-point outline
- The outward show. Verse 5 lists the visible elements: bowing the head like a reed, sackcloth, and ashes. These are the costume of repentance, but a costume is not character.
- The missing reality. The people’s fast lacked humility (true “afflicting of the soul”) and was paired with injustice (v.3-4). God sees the disconnect between ritual and righteousness.
- The calling. The positive fast (v.6-7) is release, feeding, clothing, and welcoming. The true fast is not giving up food but giving yourself to others.
Five-point outline
- God’s chosen fast versus man’s chosen fast. “Is this the fast that I have chosen?”, the people chose a day of show; God chooses a life of service.
- The posture that doesn’t fool God. Bowing the head and lying in sackcloth are easy; humbling the heart is hard.
- The day that does not satisfy. “An acceptable day to Yahweh” requires more than a calendar date; it requires a surrendered will.
- The disconnect between worship and work. The same people who fast oppress their workers (v.3), a direct contradiction.
- The redefined fast. Fasting is not just abstaining from food; it is actively feeding the hungry, freeing the oppressed, and clothing the naked (v.6-7).
Illustration hooks
- A couple goes to church every Sunday but has not spoken to their neighbour who just lost a job. Their worship feels uneven.
- A teenager gives up social media for Lent but spends the extra time scrolling instead of serving. The sacrifice misses the point.
- A small group meets to pray for the city’s poor, but no one has actually visited a shelter or invited a needy family to dinner.
Questions your congregation is asking
- “Is it wrong to use outward signs like ashes on Ash Wednesday?”
- “Does this mean that feeling sorry for my sin is not enough?”
- “How can I tell if my fasting is genuine or just habit?”
Leading a Discussion
Isaiah 58:5 cuts to the heart of religious hypocrisy. The people of God were keeping the form of a fast but missing its meaning. As you work through these questions, let the verse search you, not the other way around.
Discussion questions
- Read verse 5 aloud. What specific actions does God mention? Why do you think He singles these out?
- Look back at verses 3-4. What was the people’s attitude while they fasted? How did they treat others?
- The phrase “afflict his soul” comes from Leviticus 16:29, where it refers to the Day of Atonement. What does it mean to truly “afflict” or “humble” your soul?
- God calls this fast “acceptable” (Heb. ratson, meaning pleasure, favor, goodwill). What makes a day “acceptable” to the Lord, according to verses 6-7?
- Why is it tempting to think that outward religious acts earn God’s favor? Where have you seen that in your own life or church?
- How does this passage challenge the way you approach fasting, prayer, or other spiritual disciplines?
- What is one step you can take this week to move from a “fast of show” to a “fast of service”?
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)
| Leviticus 16:29 | “It shall be a statute to you forever: in the seventh month, on the tenth day of the month, you shall afflict your souls, and shall do no kind of work, whether native-born or a stranger who lives as a foreigner among you; |
| I Kings 21:27 | When Ahab heard those words, he tore his clothes, put sackcloth on his body, fasted, lay in sackcloth, and went about despondently. |
| I Kings 21:29 | “See how Ahab humbles himself before me? Because he humbles himself before me, I will not bring the evil in his days; but I will bring the evil on his house in his son’s day.” |
| II Kings 6:30 | When the king heard the words of the woman, he tore his clothes. Now he was passing by on the wall, and the people looked, and behold, he had sackcloth underneath on his body. |
| II Chronicles 20:3 | Jehoshaphat was alarmed, and set himself to seek Yahweh. He proclaimed a fast throughout all Judah. |
| Ezra 10:6 | Then Ezra rose up from before God’s house, and went into the room of Jehohanan the son of Eliashib. When he came there, he didn’t eat bread or drink water, for he mourned because of the trespass of the exiles. |
| Nehemiah 9:1 | Now in the twenty-fourth day of this month the children of Israel were assembled with fasting, with sackcloth, and dirt on them. |
| Nehemiah 9:2 | The offspring of Israel separated themselves from all foreigners and stood and confessed their sins and the iniquities of their fathers. |
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
9 public-domain commentaries, condensed into plain language.
Barnes' Notes on the Bible Protestant 1832
Barnes warns that the physical discomfort of fasting is not what God values or considers meritorious. The real purpose of fasting is to lead to justice, truth, and holiness, not to put on an affected show of gloom. He cautions that forced sanctimoniousness and a sad demeanor harm the cause of religion rather than help it.
Cambridge Bible for Schools and Colleges Anglican 1880
The commentator focuses on the Hebrew phrase "afflict his soul," noting it became a technical expression for genuine fasting that involves repressing sensual impulses. He argues that mere outward gestures like bowing the head or wearing sackcloth miss this inner purpose entirely. The people addressed failed to attain the true end of fasting.
Geneva Bible Notes Reformed 1599
The Geneva Notes stress that God does not choose a fast consisting only of outward ceremony—bowing the head like a bulrush or wearing sackcloth and ashes. Such external acts, however painful, are not what God calls an acceptable day. True fasting involves the heart, not mere bodily affliction.
Gill's Exposition of the Bible Baptist 1748
Gill argues that outward religious ceremonies—afflicting the body, bowing the head like a bulrush, or lying on sackcloth and ashes—do not by themselves make a fast acceptable to God. He insists that such external acts, without genuine repentance and humility, cannot atone for sin or deserve to be called a true fast.
Jamieson-Fausset-Brown Commentary Protestant 1871
JFB insists that the physical pain of fasting is not meritorious in itself. Its only value is that it leads people to amend their ways. Outward displays like bowing the head and wearing sackcloth are empty if done merely to appear to fast before others.
Keil & Delitzsch OT Commentary Protestant 1876
Keil and Delitzsch draw a sharp contrast between two kinds of fasting. Outward acts of bowing the head and wearing sackcloth mean nothing to God when selfish business continues; true fasting that pleases Him consists of releasing the oppressed, feeding the hungry, and clothing the naked. This passage exposes the self-righteous delusion that ritual alone merits reward.
Lange's Commentary Reformed 1857
Lange sees chapters 58 and 59 as a ladder the prophet climbs, moving from the moral failures of the present up to the heights of future glory. For Lange, this section builds a deliberate bridge: the prophet descends to address practical repentance so he can ascend again to prophetic vision.
Matthew Henry's Commentary Reformed/Presbyterian 1710
Matthew Henry sees these people as following Cain's path: angry at God because their fasting went unrecognized. They boast of their religious efforts while overlooking the selfishness and oppression that accompany them, treating God as unjust for not accepting services they themselves valued too highly.
Wesley's Explanatory Notes Methodist/Wesleyan 1754
Wesley stresses that a fast God accepts involves genuine heart-humiliation and life-reformation, not just outward rituals. The word "chosen" means God's delight, not arbitrary selection. A merely ceremonial fast, lacking deep repentance and real change, is not an acceptable day to the Lord.