Deuteronomy 7:7-9

7The LORD did not set his love upon you, nor choose you, because ye were more in number than any people; for ye were the fewest of all peoples:

8but because the LORD loveth you, and because he would keep the oath which he sware unto your fathers, hath the LORD brought you out with a mighty hand, and redeemed you out of 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, which keepeth covenant and mercy with them that love him and keep his commandments to a thousand generations;