Deuteronomy 7:9-11

9Therefore know [without any doubt] and understand that the Lord your God, He is God, the faithful God, who is keeping His covenant and His [steadfast] lovingkindness to a thousand generations with those who love Him and keep His commandments;

10but repays those who hate Him to their faces, by destroying them; He will not hesitate with him who hates Him, He will repay him to his face.

11Therefore, you shall keep (follow, obey) the commandment and the statutes and judgments (precepts) which I am commanding you today.