Deuteronomy 31:4

4 And the Lord shall do to them as he did to Sehon and Og the kings of the Amorrhites, and to their land, and shall destroy 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 he said to them: I am this day a hundred and twenty years old, I can no longer go out and come in, especially as the Lord also hath said to me: Thou shalt not pass over this Jordan.

3 The Lord thy God then will pass over before thee: he will destroy all these nations in thy sight, and thou shalt possess them: and this Josue shall go over before thee, as the Lord hath spoken.

4 And the Lord shall do to them as he did to Sehon and Og the kings of the Amorrhites, and to their land, and shall destroy them.

5 Therefore when the Lord shall have delivered these also to you, you shall do in like manner to them as I have commanded you.

6 Do manfully and be of good heart: fear not, nor be ye dismayed at their sight: for the Lord thy God he himself is thy leader, and will not leave thee nor forsake thee.