Deuteronomy 31:4

4 And the Lord thy God shall do to them as he did to Seon and Og the two kings of the Amorites, who were beyond Jordan, and to their land, as he destroyed them.

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 and said to them, I am this day a hundred and twenty years ; I shall not be able any longer to come in or go out; and the Lord said to me, Thou shalt not go over this Jordan.

3 The Lord thy God who goes before thee, he shall destroy these nations before thee, and thou shalt inherit them: and Joshua that goes before thy face, as the Lord has spoken.

4 And the Lord thy God shall do to them as he did to Seon and Og the two kings of the Amorites, who were beyond Jordan, and to their land, as he destroyed them.

5 And the Lord has delivered them to you; and ye shall do to them, as I charged you.

6 Be courageous and strong, fear not, neither be cowardly neither be afraid before them; for the Lord your God that advances with you in the midst of you, neither will he by any means forsake thee, nor desert thee.