Deuteronomy 29:20

18lest there should be among you man, woman, family, or tribe whose heart turns away today from the LORD our God, to go to serve the gods of those nations; lest there should be among you a root that produces bitter poison;

19and it happen, when he hears the words of this curse, that he bless himself in his heart, saying, “I shall have peace, though I walk in the stubbornness of my heart,” to destroy the moist with the dry.

20The LORD will not pardon him, but then the LORD’s anger and his jealousy will smoke against that man, and all the curse that is written in this book will fall on him, and the LORD will blot out his name from under the sky.

21The LORD will set him apart for evil out of all the tribes of Israel, according to all the curses of the covenant written in this book of the law.

22The generation to come—your children who will rise up after you, and the foreigner who will come from a far land—will say, when they see the plagues of that land, and the sicknesses with which the LORD has made it sick,