Deuteronomy 7:8-15

But because the LORD loves you and is keeping the oath which He swore to your fathers, the LORD has brought you out with a mighty hand and redeemed (bought) you from the house of slavery, from the hand of Pharaoh king of Egypt. Therefore know [without any doubt] and understand that the LORD your God, He is God, the faithful God, who is keeping His covenant and His [steadfast] lovingkindness to a thousand generations with those who love Him and keep His commandments; but repays those who hate Him to their faces, by destroying them; He will not hesitate with him who hates Him, He will repay him to his face. Therefore, you shall keep (follow, obey) the commandment and the statutes and judgments (precepts) which I am commanding you today. “Then it shall come about, because you listen to these judgments and keep and do them, that the LORD your God will keep with you the covenant and the [steadfast] lovingkindness which He swore to your fathers. He will love you and bless you and multiply you; He will also bless the fruit of your womb and the fruit of your land, your grain and your new wine and your [olive] oil, the offspring of your cattle and the young of your flock, in the land which He swore to your fathers to give you. You shall be blessed above all peoples; there will be no male or female barren (childless, infertile) among you or among your cattle. The LORD will take away from you all sickness; and He will not subject you to any of the harmful diseases of Egypt which you have known, but He will impose them on all [those] who hate you.