Deuteronomy 31:3; Deuteronomy 31:7

3 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.

7 Then Moses summoned Joshua and said to him in the sight of all Israel, "Be strong and courageous, for you shall go with this people into the land that the LORD has sworn to their fathers to give them, and you shall put them in possession of it.