Deuteronomy 8:18-20

18But thou shalt remember Jehovah thy 1God, that it is he who giveth thee power to get wealth, that he may establish his covenant which he swore unto thy fathers, as it is this day. 19And it shall be, if thou do at all forget Jehovah thy 2God, and go after other 3gods, and serve them, and bow down to them, I testify against you this day that ye shall utterly perish. 20As the nations which Jehovah is causing to perish before you, so shall ye perish; because ye would not hearken unto the voice of Jehovah your 4God.