Joshua 5:2 References

2 At that time the Lord said to Joshua, "Make for yourself aflint knives and circumcise again the sons of Israel the second time."

a Exodus 4:25

Exodus 4

25 Then Zipporah took aa flint and cut off her son's foreskin and threw it at Moses' feet, and she said, "You are indeed a bridegroom of blood to me."