Deuteronomy 29:16-20

(for you know how we lived in the land of Egypt, and how we passed through the midst of the nations through which you passed;

moreover, you have seen their abominations and their idols made of wood and stone, silver and gold, which they had with them);

so that there will not be among you a man or woman, or family or tribe, whose heart turns away today from the Lord our God, to go to serve the gods of those nations; that there will not be among you a root bearing poisonous fruit and wormwood.

And it shall be when he hears the words of this curse, that he will consider himself fortunate in his heart, saying, ‘I will do well though I walk in the stubbornness of my heart in order to destroy the watered land along with the dry.’

The Lord will not be willing to forgive him, but rather the anger of the Lord and His wrath will burn against that person, and every curse that is written in this book will lie upon him, and the Lord will wipe out his name from under heaven.