Exodus 20:5-6

You shall not worship them nor serve them; for I, the LORD your God, am a jealous (impassioned) God [demanding what is rightfully and uniquely mine], visiting (avenging) the iniquity (sin, guilt) of the fathers on the children [that is, calling the children to account for the sins of their fathers], to the third and fourth generations of those who hate Me, [Is 42:8; 48:11] but showing graciousness and steadfast lovingkindness to thousands [of generations] of those who love Me and keep My commandments.