Deuteronomy 5:9-10

9You shall not worship them or 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 the fourth generations of those who hate Me,

10but showing graciousness and lovingkindness to thousands [of generations] of those who love Me and keep My commandments.