Joshua 5:4-6

Revised Geneva Translation

⁴ And this is why Joshua circumcised all the people (the males) who came out of Egypt: because all the men of war were dead 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, after they came out of Egypt, were not circumcised.

⁶ For the children of Israel walked forty years in the wilderness, until all the people of the men of war who came out of Egypt were consumed, because they did not obey the voice of the LORD (and to whom the LORD swore that He would not show the land which the LORD had sworn to their fathers, that He would give us, a land that flows with milk and honey).