Deuteronomy 7:8-9

8But because the LORD loved you, and because he would keep the oath which he had sworn to your fathers, hath the LORD brought you out with a mighty hand, and redeemed you from the house of bondage, from the hand of Pharaoh king of Egypt.

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