John Gill Commentary Deuteronomy 29:8

"and we took their land, and gave it for an inheritance unto the Reubenites, and to the Gadites, and to the half-tribe of the Manassites." — Deuteronomy 29:8 (ASV)

And we took their land
Which belonged to the two kings, the lands of Jazer, Gilead, and Bashan, fine countries for pasturage:

and gave it for an inheritances unto the Reubenites, and to the
Gadites, and to the half tribe of Manasseh ;
who requested it, and to whom it was granted on certain conditions, and they were now in possession of it; see (Numbers 32:1–42) .