Deuteronomy 7:9

9 And thou shalt know that Jehovah thy God, he is God, the faithful God, who keepeth covenant and mercy to a thousand generations with them that love him and keep his commandments;

Deuteronomy 7:9 In-Context

7 Not because ye were more in number than all the peoples, hath Jehovah been attached to you and chosen you, for ye are the fewest of all the peoples;
8 but because Jehovah loved you, and because he would keep the oath which he had sworn unto your fathers, hath Jehovah brought you out with a powerful hand, and redeemed you out of the house of bondage, from the hand of Pharaoh king of Egypt.
9 And thou shalt know that Jehovah thy God, he is God, the faithful God, who keepeth covenant and mercy to a thousand generations with them that love him and keep his commandments;
10 and repayeth them that hate him [each] to his face, to cause them to perish: he delayeth not with him that hateth him, he will repay him to his face.
11 And thou shalt keep the commandment, and the statutes, and the ordinances, which I command thee this day, to do them.
The Darby Translation is in the public domain.