Deuteronomy 29:8

29:8 Then we took their land and gave it as an inheritance to Reuben, Gad, and half the tribe of Manasseh.

Deuteronomy 3:12

Distribution of the Transjordanian Allotments

3:12 This is the land we brought under our control at that time: The territory extending from Aroer ¹  by the Wadi Arnon and half the Gilead hill country with its cities I gave to the Reubenites and Gadites. ² 

Deuteronomy 3:16

3:16 To the Reubenites and Gadites I allocated the territory extending from Gilead as far as Wadi Arnon (the exact middle of the wadi was a boundary) all the way to the Wadi Jabbok, the Ammonite border.

Deuteronomy 4:43

4:43 These cities are Bezer, in the desert plateau, for the Reubenites; Ramoth in Gilead for the Gadites; and Golan in Bashan for the Manassehites.

[3:12]  ¹ tn The words “the territory extending” are not in the Hebrew text; they are supplied in the translation for stylistic reasons.

[3:12]  ² sn Reubenites and Gadites. By the time of Moses’ address the tribes of Reuben, Gad, and Manasseh had already been granted permission to settle in the Transjordan, provided they helped the other tribes subdue the occupants of Canaan (cf. Num 32:28-42).