Deuteronomy 31:2-4

New Century Version

² “I am now one hundred twenty years old, and I cannot lead you anymore. The Lord told me I would not cross the Jordan River; ³ the Lord your God will lead you across himself. He will destroy those nations for you, and you will take over their land. Joshua will also lead you across, as the Lord has said. ⁴ The Lord will do to those nations what he did to Sihon and Og, the kings of the Amorites, when he destroyed them and their land.