Deuteronomy 7:11

7 The LORD did not set His affection on you and choose you because you were more numerous than the other peoples, for you were the fewest of all peoples.

8 But because the LORD loved you and kept the oath He swore to your fathers, He brought you out with a mighty hand and redeemed you from the house of slavery, from the hand of Pharaoh king of Egypt.

9 Know therefore that the LORD your God is God, the faithful God who keeps His covenant of loving devotion for a thousand generations of those who love Him and keep His commandments.

10 But those who hate Him He repays to their faces with destruction; He will not hesitate to repay to his face the one who hates Him.

11 So keep the commandments and statutes and ordinances that I am giving you to follow this day.

12 If you listen to these ordinances and keep them carefully, then the LORD your God will keep His covenant and the loving devotion that He swore to your fathers.

13 He will love you and bless you and multiply you. He will bless the fruit of your womb and the produce of your land—your grain, new wine, and oil, the young of your herds and the lambs of your flocks—in the land that He swore to your fathers to give you.

14 You will be blessed above all peoples; among you there will be no barren man or woman or livestock.

15 And the LORD will remove from you all sickness. He will not lay upon you any of the terrible diseases you knew in Egypt, but He will inflict them on all who hate you.

Read all of Deuteronomy 7