Deuteronomy 31:4-6

King James Version

⁴ And the Lord shall do unto them as he did to Sihon and to Og, kings of the Amorites, and unto the land of them, whom he destroyed.

⁵ And the Lord shall give them up before your face, that ye may do unto them according unto all the commandments which I have commanded you.

⁶ Be strong and of a good courage, fear not, nor be afraid of them: for the Lord thy God, he it is that doth go with thee; he will not fail thee, nor forsake thee.