Joshua 5:4

4 And the way in which Joshua purified the children of Israel; as many as were born in the way, and as many as were uncircumcised of them that came out of Egypt,

Joshua 5:4 Meaning and Commentary

Joshua 5:4

And this [is] the cause why Joshua did circumcise
Or the reason of the command given him to circumcise the children of Israel at this time, namely, what follows:

all the people that came out of Egypt [that were] males, [even] all
the men of war;
meaning such that were twenty years old, and upwards:

died in the wilderness, by the way, after they came out of Egypt;
not directly, but in a course of forty years, as they journeyed through the wilderness; this is to be understood with an exception of Joshua, Caleb, Eleazar but then there was a large number who were under twenty years of age, that came out of Egypt, and were now living.

Joshua 5:4 In-Context

2 And about this time the Lord said to Joshua, Make thee stone knives of sharp stone, and sit down and circumcise the children of Israel the second time.
3 And Joshua made sharp knives of stone, and circumcised the children of Israel at the place called the “Hill of Foreskins.”
4 And the way in which Joshua purified the children of Israel; as many as were born in the way, and as many as were uncircumcised of them that came out of Egypt,
5 all these Joshua circumcised; for forty and two years Israel wondered in the wilderness of Mabdaris—
6 Wherefore most of the fighting men that came out of the land of Egypt, were uncircumcised, who disobeyed the commands of God; concerning whom also he determined that they should not see the land, which the Lord sware to give to their fathers, a land flowing with milk and honey.

The Brenton translation of the Septuagint is in the public domain.