Deuteronomy 29:17-20

17and ye have seen their abominations, and their idols, wood and stone, silver and gold, which were among them);

18lest there should be among you man, or woman, or family, or tribe, whose heart turneth away this day from Jehovah our 1God, to go and serve the 2gods of these nations; lest there should be among you a root that beareth gall and wormwood,

19and it come to pass, when he heareth 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 sweep away the drunken with the thirsty.

20Jehovah will not pardon him, but the anger of Jehovah and his jealousy will then smoke against that man, and all the curse shall be upon him that is written in this book; and Jehovah will blot out his name from under the heavens;