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.
Jewish Publication Society of America Version (JPS1917) - Deuteronomy 8:19 >And it shall be, if thou shalt forget the LORD thy God, and walk after other gods, and serve them, and worship them, I forewarn you this day that ye shall surely perish.