Deuteronomy 31:1-6

So Moses continued to speak these words to all Israel. And he said to them, “I am 120 years old today. I am no longer able to go out and come in. The LORD has said to me, ‘You shall not go over this Jordan.’ The LORD your God himself will go over before you. He will destroy these nations before you, so that you shall dispossess them, and Joshua will go over at your head, as the LORD has spoken. 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.”