George Leo Haydock

The children of unbelief are either those who perished in Noe’s[Noah’s] flood, for St. Peter in his epistle give them this title, or they are the inhabitants of Chanaan[Canaan], whom Josue[Joshua] exterminated; for these also are called children of unbelief, in the epistle to the Hebrews, and their crimes were the same as those mentioned here. (Calmet)