Deuteronomy 31:4-6

And the LORD will do to them as he did to Sihon and Og, the kings of the Amorites, and to their land, when he destroyed them. And the LORD will give them over to you, and you shall do to them according to the whole commandment that I have commanded you. Be strong and courageous. Do not fear or be in dread of them, for it is the LORD your God who goes with you. He will not leave you or forsake you.”