Deuteronomy 29:18-21

I am making this covenant with you so that no one among you—no man, woman, clan, or tribe—will turn away from the LORD our God to worship these gods of other nations, and so that no root among you bears bitter and poisonous fruit. “Those who hear the warnings of this curse should not congratulate themselves, thinking, ‘I am safe, even though I am following the desires of my own stubborn heart.’ This would lead to utter ruin! The LORD will never pardon such people. Instead his anger and jealousy will burn against them. All the curses written in this book will come down on them, and the LORD will erase their names from under heaven. The LORD will separate them from all the tribes of Israel, to pour out on them all the curses of the covenant recorded in this Book of Instruction.