Joshua 5:2 Commentary: Flint Knives and Covenant Renewal

The events of Joshua 5 take place at Gilgal, the first encampment in Canaan after the miraculous crossing of the Jordan. The timing is deliberate. According to Wesley, the people arrived on the tenth day of the first month; circumcision took place on the eleventh, leaving them sore and vulnerable until the fourteenth, when they kept the Passover (v.10). The surrounding Canaanite kings had just heard of the dried-up Jordan (v.1); their 'heart melted' and they had 'no more spirit', exactly the condition needed for the uncircumcised Israelites to undergo surgery in safety. The wilderness generation had not been circumcised for forty years (vv.4-7). Calvin wrestles with this neglect: 'It seems very strange and almost monstrous, that circumcision had so long been laid aside.' He rejects excuses of constant movement, arguing the omission stemmed from distrust of God. Cambridge notes that the nation was under judgment during those years; the sentence of death on the exodus generation (Num 14:29) meant the covenant sign was suspended. Now a new generation stands at the border. The flint knives (חרבות צרים) were not a primitive improvisation. Clarke cites Egyptian embalming practices, where metal was considered profane for incisions, and Ludolf's report that Ethiopian Jews still used stone knives. Gill notes that the Talmud permits only stone knives for circumcision. The verse draws a line: Abraham's covenant, sealed in flesh, must be renewed before the land is possessed. The 'second time' is not a repetition on the same persons but a national resumption, a 'return' to the rite that had been abandoned. As Barnes summarizes, 'make that which once was a circumcised people but is not so now, once more a circumcised people.'

The consulted sources note no significant textual variants for Joshua 5:2. The Hebrew חַרְב֣וֹת צֻרִ֑ים ('knives of flint') is consistent across manuscripts. The KJV rendering 'sharp knives' glosses the sense rather than the material. The Greek Septuagint also reads 'stone knives.' There is no evidence of scribal emendation affecting the meaning.

Christians have read this passage as more than an antiquarian note. Barnes records that 'the fathers generally' saw the flint knives as a type of Christ the Rock, who performs the true circumcision (Col 2:11). Calvin focused on the theological lesson: Israel’s neglect of circumcision revealed their broken relationship with God, and the renewal at Gilgal was a gracious restoration. Jewish tradition, reflected in the Talmud and later commentators like Kimchi and Ben Melech (as cited by Gill), emphasized the ritual purity of stone knives, a practice that continued in some Jewish communities. The passage has also been read as a prefiguration of baptism, the 'circumcision of Christ' that initiates believers into the new covenant, and as a call for spiritual renewal in times of transition.

Three-point outline

1. The Right Time. God commands circumcision at a moment of maximum vulnerability, just after crossing the Jordan, with the enemy paralyzed (v.1) and Passover days away (v.10). God protects His people even as they fulfill a painful command (Wesley, Keil & Delitzsch).
2. The Right Tool. Flint knives, not iron, were prescribed. Clarke and Gill argue this was a ritual requirement, echoing the prohibition of iron on the altar (Ex 20:25). The material itself signals that this is no ordinary surgery, it is a holy act of consecration.
3. The Right Heart. The outward rite points inward. As Deuteronomy 10:16 and 30:6 make clear, the goal is a circumcised heart. Paul picks up this theme in Romans 2:29 and Colossians 2:11: the true circumcision is by Christ, the Rock, the Flint.

Five-point outline

1. Preparation for the Promised Land. Before battle and before the Passover meal, the covenant must be fresh (vv.2-10).
2. The Wilderness Generation’s Failure. Forty years of neglect (vv.4-6) showed a people under judgment, unwilling to trust God enough to circumcise their children (Calvin).
3. God’s Provision of Safety. The kings’ melted hearts (v.1) were not a coincidence; they created a window for healing (Poole).
4. The Symbolism of Flint. From Zipporah (Ex 4:25) to the altar law (Ex 20:25), stone knives signify the sacred, and Barnes notes the fathers saw Christ here.
5. Passing the Faith to the Next Generation. The rite was for those born in the wilderness. They could not inherit the land without the covenant sign.

Illustration hooks

• A family uses a special, antique tool for an annual ceremony, like a grandfather’s carving knife at Thanksgiving. The flint knives were Israel’s heirloom for this covenant act.
• An athlete takes time to sharpen his blade or re-tape his stick before the championship game. Israel sharpened flint before entering Canaan.
• A couple renews their wedding vows after a hard season. The “second time” of circumcision was a renewal of vows after the wilderness failure.

Questions your congregation is asking

• Why would God put His people in a vulnerable, healing state right before a battle?
• Does this command mean we need physical rituals today? What does “circumcision of the heart” look like in practice?
• How do we renew our covenant with God when we have let our spiritual disciplines slide?

This passage is a hinge in Israel’s story. They have crossed the Jordan, but they are not yet warriors. Before they can fight for the land, God insists they pause for a painful act of covenant renewal. The flint knives, the timing, and the phrase “the second time” all carry weight. Use the following questions to help your group wrestle with why this mattered then, and what it means for a community of faith today.

Discussion questions

1. Read Joshua 5:1-9. Why do you think the writer mentions the kings’ melted hearts in verse 1 before recording the circumcision command? How does that order shape the mood of the scene?
2. The text twice mentions flint knives. What other places in Scripture use flint or stone for sacred purposes (Ex 4:25, Ex 20:25)? What might the material itself communicate about this act?
3. Verses 4-7 explain that the wilderness generation was not circumcised. Calvin calls this “almost monstrous.” What does the neglect reveal about Israel’s relationship with God during those forty years?
4. What does “circumcise again the second time” mean? Does it imply a previous general circumcision, or just a resumption of the practice? How does the context of the wilderness help decide?
5. How does this event prepare Israel for the Passover they will celebrate in verse 10? What is the link between circumcision and the Passover meal?
6. Read Deuteronomy 10:16 and 30:6. What do these passages teach about the deeper meaning of circumcision? How does Paul develop this in Romans 2:29 and Colossians 2:11?
7. In what ways do we as a community need to “return and circumcise” after times of neglect? What would a contemporary renewal of covenant look like?