Deuteronomy 31:4-31:6
The Lord will do to them as He did to Sihon and Og, kings of the Amorites, and to their countries, when He wiped them out. The Lord will deliver them up to you, and you shall deal with them in full accordance with the Instruction that I have enjoined upon you. Be strong and resolute, be not in fear or in dread of them; for the Lord your God Himself marches with you: He will not fail you or forsake you.