Deuteronomy 7:7-9

7The Lord did not set his affection on you and choose you because you were more numerous than other peoples, for you were the fewest of all peoples. 8But it was because the Lord loved you and kept the oath he swore to your ancestors that he brought you out with a mighty hand and redeemed you from the land of slavery, from the power of Pharaoh king of Egypt. 9Know therefore that the Lord your God is God; he is the faithful God, keeping his covenant of love to a thousand generations of those who love him and keep his commandments.