Deuteronomy 31:1-3

When Moses had finished giving these instructions to all the people of Israel, he said, “I am now 120 years old, and I am no longer able to lead you. The LORD has told me, ‘You will not cross the Jordan River.’ But the LORD your God himself will cross over ahead of you. He will destroy the nations living there, and you will take possession of their land. Joshua will lead you across the river, just as the LORD promised.