Joshua 12:6

So Moses gave to them, to the sons of Gad and to the sons of Reuben and to the half-tribe of Joseph’s son Manasseh, the kingdom of Sihon, king of the Amorites and the kingdom of Og, the king of Bashan, the land with its cities with their territories, the cities of the surrounding land.

“Thus we took the land at that time from the hand of the two kings of the Amorites who were beyond the Jordan, from the valley of Arnon to Mount Hermon

With the other half-tribe, the Reubenites and the Gadites received their inheritance which Moses gave them beyond the Jordan to the east, just as Moses the servant of Yahweh gave to them;