Deuteronomy 31:4-6

And the LORD will do to them as He did to Sihon and Og, the kings of the Amorites and their land, when He destroyed them. The LORD will give them over to you, that you may do to them according to every commandment which I have commanded you. Be strong and of good courage, do not fear nor be afraid of them; for the LORD your God, He is the One who goes with you. He will not leave you nor forsake you.”