Deuteronomy 8:10, 19
Deuteronomy 8:10 KJV
When thou hast eaten and art full, then thou shalt bless the LORD thy God for the good land which he hath given thee.
Deuteronomy 8:19 KJV
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.