Deuteronomy 31:3-5

3It is the Lord your God who will cross ahead of you; He will destroy these nations before you, and you shall dispossess them. Joshua is the one who will go across before you [to lead you], just as the Lord has said.

4The Lord will do to them just as He did to Sihon and Og, the kings of the Amorites, and to their land, when He destroyed them.

5The Lord will hand them over to you, and you shall do to them in accordance with all the commandments which I have commanded you.