Deuteronomy 7:12-16

"And because you hearken to these ordinances, and keep and do them, the LORD your God will keep with you the covenant and the steadfast love which he swore to your fathers to keep; he will love you, bless you, and multiply you; he will also bless the fruit of your body and the fruit of your ground, your grain and your wine and your oil, the increase 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 shall not be male or female barren among you, or among your cattle. And the LORD will take away from you all sickness; and none of the evil diseases of Egypt, which you knew, will he inflict upon you, but he will lay them upon all who hate you. And you shall destroy all the peoples that the LORD your God will give over to you, your eye shall not pity them; neither shall you serve their gods, for that would be a snare to you."