Deuteronomy 7:12-16

12“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.

13He 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.

14You shall be blessed above all peoples; there will be no male or female barren (childless, infertile) among you or among your cattle.

15The 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.

16And you shall consume all the peoples whom the Lord your God will give over to you; your eye shall not pity them, nor shall you serve their gods, for that would be a [deadly] trap to you.