Deuteronomy 8:19-20 King James 2000 (KJ2000)

19. And it shall be, if you do at all forget the LORD your God, and walk after other gods, and serve them, and worship them, I testify against you this day that you shall surely perish.

20. As the nations which the LORD destroys before your face, so shall you perish; because you would not be obedient unto the voice of the LORD your God.

Deuteronomy 8