Joshua 5:7

“And the children [whom] he raised up in their stead, them Joshua circumcised, etc.] Who were born to them in the wilderness, and succeeded them, some of which might be near forty years of age; as for those that were born before, of which there might be many now living, they had been circumcised already, but others, were not: for they were circumcised, because they had not circumcised them by the way; or while journeying the forty years in the wilderness; which, as before observed, seems to be the true reason of the omission of circumcision.”

“Of the whole nation those only were already circumcised at the time of the passage of the Jordan who had been under twenty years of age at the time of the complaining and consequent rejection at Kadesh (compare the marginal reference). These would have been circumcised before they left Egypt, and there would still survive of them more than a quarter of a million of thirty-eight years old and upward. The statements of these verses are of a general kind. The “forty years” of Joshua 5:6 is a round number, and the statement in the latter part of Joshua 5:5 cannot be strictly accurate. For there must have been male children born in the wilderness during the first year after the Exodus, and these…”

“Circumcised - Which God would have done, As a testimony of God's reconciliation to the people, and that he would not farther impute their parents rebellion to them. Because the great impediment of circumcision was now removed, their continued travels, and frequent and uncertain removal. To prepare them for the approaching passover. To distinguish them from the Canaanites, into whose land they were now come. To ratify the covenant between God and them, whereof circumcision was a sign and seal, to assure them that God would now make good his covenant, in giving them this land; and to oblige them to perform all the duties to which that covenant bound them, as soon as they came into Canaan, Exo…”

“their children: Num 14:31; Deu 1:39 Joshua 5:8”