Pensée juive sur Le Deutéronome 13:16

When it is said that God is visiting the iniquity of the fathers upon the children, this refers exclusively to the sin of idolatry, and to no other sin. That this is the case may be inferred from what is said in the ten commandments, “upon the third and fourth generation of my enemies” (Exod. 20:5), none except idolaters being called “enemy”; comp. also “every abomination to the Lord, which he hateth” (Deut. 12:31). It was, however, considered sufficient to extend the punishment to the fourth generation, because the fourth generation is the utmost a man can see of his posterity; and when, therefore, the idolaters of a place are destroyed, the old man worshipping idols is killed, his son, his grandson, and his great-grandson, that is, the fourth generation. By the mention of this attribute we are, as it were, told that His commandments, undoubtedly in harmony with His acts, include the death even of the little children of idolaters because of the sin of their fathers and grandfathers. This principle we find frequently applied in the Law, as, e.g., we read concerning the city that has been led astray to idolatry, “destroy it utterly, and all that is therein” (Deut. 13:15). All this has been ordained in order that every vestige of that which would lead to great injury should he blotted out, as we have explained.