Deuteronomy 31:4

4 "The LORD will do to those nations what he did to Sihon and Og. He destroyed those Amorite kings along with their land.

Deuteronomy 31:4 Meaning and Commentary

Deuteronomy 31:4

And the Lord shall do unto them as he did unto Sihon, and to
Og, kings of the Amorites
Deliver them up into their hands; see the history of this in ( Numbers 21:10-35 ) ;

and unto the land of them whom he destroyed;
put them into the possession of the land of Canaan, as they were now in possession of the land of those two kings he destroyed by them. This instance is given to encourage their faith, assuring them that what had been done to them would be done to the Canaanitish kings, and their subjects, and their lands.

Deuteronomy 31:4 In-Context

2 I said, "I am now 120 years old. I'm not able to lead you anymore. The LORD has said to me, 'You will not go across the Jordan River.'

3 "The LORD your God himself will go across ahead of you. He'll destroy the nations that are there in order to make room for you. You will take over their land. Joshua will also go across ahead of you, just as the LORD said he would.

4 "The LORD will do to those nations what he did to Sihon and Og. He destroyed those Amorite kings along with their land.

5 The LORD will hand those nations over to you. Then you must do to them everything I've commanded you to do.

6 "Be strong and brave. Don't be afraid of them. Don't be terrified because of them. The LORD your God will go with you. He will never leave you. He'll never desert you."