NET Bible
"Indeed, for forty years the Israelites traveled through the wilderness until all the men old enough to fight when they left Egypt, the ones who had disobeyed the LORD, died off. For the LORD had sworn a solemn oath to them that he would not let them see the land he had sworn by oath to their ancestors to give them, a land rich in milk and honey."
— Joshua 5:6, NET Bible
“For the children of Israel walked forty years in the wilderness, till all the people that were men of war, which came out of Egypt, were consumed, because they obeyed not the voice of the Lord: unto whom the Lord sware that he would not shew them the land, which the Lord sware unto their fathers that he would give us, a land that floweth with milk and honey.”
“For the children of Israel walked forty years in the wilderness, till all the nation, even the men of war that came forth out of Egypt, were consumed, because they hearkened not unto the voice of Jehovah: unto whom Jehovah sware that he would not let them see the land which Jehovah sware unto their fathers that he would give us, a land flowing with milk and honey. ”
“For the children of Israel walked forty years in the wilderness, until all the nation, even the men of war who came out of Egypt, were consumed, because they didn't listen to the voice of Yahweh. Yahweh swore to them that he wouldn't let them see the land which Yahweh swore to their fathers that he would give us, a land flowing with milk and honey.”
“During the forty years of the journey in the wide wilderness, were uncircumcised: till all they were consumed that had not heard the voice of the Lord, and to whom he had sworn before, that he would not shew them the land flowing with milk and honey.”
“For the children of Israel were wandering in the waste land for forty years, till all the nation, that is, all the fighting-men, who had come out of Egypt, were dead, because they did not give ear to the voice of the Lord: to whom the Lord said, with an oath, that he would not let them see the land which the Lord had given his word to their fathers to give us, a land flowing with milk and honey.”
“For the children of Israel walked forty years in the wilderness, till all the people that were men of war, which came out of Egypt, were consumed, because they obeyed not the voice of the Lord: unto whom the Lord sware that he would not shew them the land, which the Lord sware unto their fathers that he would give us, a land that floweth with milk and honey.”
So Joshua made flint knives and circumcised the Israelites on the Hill of the Foreskins.
This is why Joshua had to circumcise them: All the men old enough to fight when they left Egypt died on the journey through the wilderness after they left Egypt.
Now all the men who left were circumcised, but all the sons born on the journey through the wilderness after they left Egypt were uncircumcised.
Indeed, for forty years the Israelites traveled through the wilderness until all the men old enough to fight when they left Egypt, the ones who had disobeyed the LORD, died off. For the LORD had sworn a solemn oath to them that he would not let them see the land he had sworn by oath to their ancestors to give them, a land rich in milk and honey.
He replaced them with their sons, whom Joshua circumcised. They were uncircumcised; their fathers had not circumcised them along the way.
When all the men had been circumcised, they stayed there in the camp until they had healed.
The LORD said to Joshua,“Today I have taken away the disgrace of Egypt from you.” So that place is called Gilgal even to this day.