Deuteronomy 29:17

13 and so that He may establish you today as His people, and He may be your God as He promised you and as He swore to your fathers, to Abraham, Isaac, and Jacob.

14 I am making this covenant and this oath not only with you,

15 but also with those who are standing here with us today in the presence of the LORD our God, as well as with those who are not here today.

16 For you yourselves know how we lived in the land of Egypt and how we passed through the nations on the way here.

17 You saw the abominations and idols among them made of wood and stone, of silver and gold.

18 Make sure there is no man or woman, clan or tribe among you today whose heart turns away from the LORD our God to go and worship the gods of those nations. Make sure there is no root among you that bears such poisonous and bitter fruit,

19 because when such a person hears the words of this oath, he invokes a blessing on himself, saying, ‘I will have peace, even though I walk in the stubbornness of my own heart.’ This will bring disaster on the watered land as well as the dry.

20 The LORD will never be willing to forgive him. Instead, His anger and jealousy will burn against that man, and every curse written in this book will fall upon him. The LORD will blot out his name from under heaven

21 and single him out from all the tribes of Israel for disaster, according to all the curses of the covenant written in this Book of the Law.

Read all of Deuteronomy 29