Deuteronomy 3:12

And this land, which we possessed at that time
Or took possession of, having conquered it; for it still remained in their possession:

from Aroer, which is by the river Arnon:
on the borders of Moab, from thence as far as Gilead was the land which was taken from Sihon king of Heshbon, ( Deuteronomy 2:36 )

and half Mount Gilead, and the cities thereof:
which were taken from Og king of Bashan, ( Deuteronomy 3:10 )

gave I unto the Reubenites, and to the Gadites;
at their request, on certain conditions to be performed by them, afterwards repeated.