Deuteronomy 7:12-16

Blessings for Obedience
(Lev 26.1—13; Deut 28.1—14)
If you heed these ordinances, by diligently observing them, the LORD your God will maintain with you the covenant loyalty that he swore to your ancestors; he will love you, bless you, and multiply you; he will bless the fruit of your womb and the fruit of your ground, your grain and your wine and your oil, the increase of your cattle and the issue of your flock, in the land that he swore to your ancestors to give you. You shall be the most blessed of peoples, with neither sterility nor barrenness among you or your livestock. The LORD will turn away from you every illness; all the dread diseases of Egypt that you experienced, he will not inflict on you, but he will lay them on all who hate you. You shall devour all the peoples that the LORD your God is giving over to you, showing them no pity; you shall not serve their gods, for that would be a snare to you.