Deuteronomy 3:12-13

And this land we took in possession at that time: from Aroer, which is by the valley of the Arnon, and half the hill-country of Gilead, and the cities thereof, gave I unto the Reubenites and to the Gadites: and the rest of Gilead, and all Bashan, the kingdom of Og, gave I unto the half-tribe of Manasseh; all the region of Argob, even all Bashan. (The same is called the land of Rephaim.