Joshua 13:8, 9-13, 24-28

The other half-tribe of Manasseh, with the Reubenites and Gadites, had been given their inheritance by Moses on the other side of the Jordan eastward. Moses the servant of GOD gave it to them.

This land extended from Aroer at the edge of the Arnon Gorge and the city in the middle of the valley, taking in the entire tableland of Medeba as far as Dibon, and all the towns of Sihon king of the Amorites, who ruled from Heshbon, and out to the border of the Ammonites. It also included Gilead, the country of the people of Geshur and Maacah, all of Mount Hermon, and all Bashan as far as Salecah—the whole kingdom of Og in Bashan, who reigned in Ashtaroth and Edrei. He was one of the last survivors of the Rephaim. Moses had defeated them and taken their land. The People of Israel never did drive out the Geshurites and the Maacathites—they’re still there, living in Israel.

To the tribe of Gad, clan by clan, Moses gave: the territory of Jazer and all the towns of Gilead and half the Ammonite country as far as Aroer near Rabbah; the land from Heshbon to Ramath Mizpah and Betonim, and from Mahanaim to the region of Debir; in the valley: Beth Haram, Beth Nimrah, Succoth, and Zaphon, with the rest of the kingdom of Sihon king of Heshbon (the east side of the Jordan, north to the end of the Sea of Kinnereth). This was the inheritance of the Gadites, their cities and villages, clan by clan.