Deuteronomy 7:9-11

King James Version

⁹ Know therefore that the Lord thy God, he is God, the faithful God, which keepeth covenant and mercy with them that love him and keep his commandments to a thousand generations;

¹⁰ And repayeth them that hate him to their face, to destroy them: he will not be slack to him that hateth him, he will repay him to his face.

¹¹ Thou shalt therefore keep the commandments, and the statutes, and the judgments, which I command thee this day, to do them.