Deuteronomy 8:19
King James Version
“And it shall be, if thou do at all forget the LORD thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.”
Context
16Who fed thee in the wilderness with manna, which thy fathers knew not, that he might humble thee, and that he might prove thee, to do thee good at thy latter end;
17And thou say in thine heart, My power and the might of hand hath gotten me this wealth.
18But thou shalt remember the LORD thy God: for he that giveth thee power to get wealth, that he may establish his covenant which he sware unto thy fathers, as this day.
19And it shall be, if thou do at all forget the LORD thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.
20As the nations which the LORD destroyeth before your face, so shall ye perish; because ye would not be obedient unto the voice of the LORD your God.