Deuteronomy 31:4

4 And Yahweh will do to them [just] as he did to Sihon and to Og, kings of the Amorites, and to their land, which he destroyed with 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 [a] hundred and twenty years old {today}; I am not able to go out and to come [in] [any] longer, and Yahweh said to me, 'You may not cross this Jordan.'

3 Yahweh your God [is about to] cross {before you}; he will destroy these nations {before you}, and you shall dispossess them. Joshua [will be] crossing {before you}, [just] as Yahweh {promised}.

4 And Yahweh will do to them [just] as he did to Sihon and to Og, kings of the Amorites, and to their land, which he destroyed with them.

5 And Yahweh {will deliver them to you before you}, and you shall do to them according to every commandment that I have commanded you.

6 Be strong and be courageous; you should not be afraid, and you {should not be in dread from their presence}, for Yahweh your God [is] the [one] going with you; he will not leave you alone and he will not forsake you."