Deuteronomy 8:11, 19
Deuteronomy 8:11 ASV
Beware lest thou forget Jehovah thy God, in not keeping his commandments, and his ordinances, and his statutes, which I command thee this day
Deuteronomy 8:19 ASV
And it shall be, if thou shalt forget Jehovah thy God, and walk after other gods, and serve them, and worship them, I testify against you this day that ye shall surely perish.