Deuteronomy 31:4-6

American Standard Version

⁴ And Jehovah will do unto them as he did to Sihon and to Og, the kings of the Amorites, and unto their land; whom he destroyed. ⁵ And Jehovah will deliver them up before you, and ye shall do unto them according unto all the commandment which I have commanded you. ⁶ Be strong and of good courage, fear not, nor be affrighted at them: for Jehovah thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee.