Esodo 20:5

Thou shalt not bow down thyself to them, nor serve them: for I the LORD thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me; Jealous God - This shows in a most expressive manner the love of God to this people. He felt for them as the most affectionate husband could do for his spouse; and was jealous for their fidelity, because he willed their invariable happiness.

Visiting the iniquity of the fathers upon the children - This necessarily implies - if the children walk in the steps of their fathers; for no man can be condemned by Divine justice for a crime of which he was never guilty; see Ezechiele 18. Idolatry is however particularly intended, and visiting sins of this kind refers principally to national judgments.

By withdrawing the Divine protection the idolatrous Israelites were delivered up into the hands of their enemies, from whom the gods in whom they had trusted could not deliver them. This God did to the third and fourth generations, i.e., successively; as may be seen in every part of the Jewish history, and particularly in the book of Judges. And this, at last, became the grand and the only effectual and lasting means in his hand of their final deliverance from idolatry; for it is well known that after the Babylonish captivity the Israelites were so completely saved from idolatry, as never more to have disgraced themselves by it as they had formerly done. These national judgments, thus continued from generation to generation, appear to be what are designed by the words in the text, Visiting the sins of the fathers upon the children, etc.