Joshua:5:2-4
kjv@Joshua:5:2 @ At that time the LORD said unto Joshua, Make thee sharp knives, and circumcise again the children of Israel the second time.
kjv@Joshua:5:3 @ And Joshua made him sharp knives, and circumcised the children of Israel at the hill of the foreskins.
kjv@Joshua:5:4 @ And this is the cause why Joshua did circumcise: All the people that came out of Egypt, that were males, even all the men of war, died in the wilderness by the way, after they came out of Egypt.