Deuteronomy 7:9, 12-13

“Therefore know that the LORD your God, He is God, the faithful God who keeps covenant and mercy for a thousand generations with those who love Him and keep His commandments

“Then it shall come to pass, because you listen to these judgments, and keep and do them, that the LORD your God will keep with you the covenant and the mercy which He swore to your fathers. And 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 oil, the increase of your cattle and the offspring of your flock, in the land of which He swore to your fathers to give you.