Joshua 5:4

4 And this is the cause of the second circumcision; all the people of male kind, that went out of Egypt, all the men fighters of them, were dead in (the) desert by the full long compasses of (the) way, (And this is the reason for the second circumcision; all the males, who went out of Egypt, yea, all their fighting men, who had died in the wilderness on the very long journey on the way,)

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 In that time the Lord said to Joshua, Make to thee knives of stone (Make thou some stone knives), and circumcise thou the sons of Israel the second time.

3 Joshua did those things which the Lord commanded, and he circumcised the sons of Israel in the hill of prepuces (and he circumcised the male Israelites at the Hill of the Foreskins).

4 And this is the cause of the second circumcision; all the people of male kind, that went out of Egypt, all the men fighters of them, were dead in (the) desert by the full long compasses of (the) way, (And this is the reason for the second circumcision; all the males, who went out of Egypt, yea, all their fighting men, who had died in the wilderness on the very long journey on the way,)

5 the which all were circumcised. But the other people that was born in desert by forty years, in the way of the full broad wilderness, was uncircumcised, (were all circumcised. But the other males, those who were born in the wilderness, were uncircumcised.)

6 till they (all) were wasted, that heard not the voice of the Lord, and to which he swore before, that he should (not) show to them the land flowing with milk and honey. (Yea, for forty years, they went on the way of the very broad wilderness, until all of them had died who had not obeyed the voice of the Lord, and to whom he had sworn before, that he would not let them see the land flowing with milk and honey.)