Joshua 5:4 in the King James Version
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.
Context
3 Joshua made himself flint knives, and circumcised the sons of Israel at the hill of the foreskins.
4 This is the reason Joshua circumcised them: all the people who came out of Egypt, who were males, even all the men of war, died in the wilderness along the way, after they came out of Egypt.
5 For all the people who came out were circumcised; but all the people who were born in the wilderness along the way as they came out of Egypt had not been circumcised.