Deuteronomy 3:10-13

10all the cities of the plateau, and all Gilead, and all Bashan, as far as Salchah and Edrei, the cities of the kingdom of Og in Bashan.

11For only Og the king of Bashan remained of the residue of giants: behold, his bedstead was a bedstead of iron; is it not in Rabbah of the children of Ammon? its length was nine cubits, and its breadth four cubits, after the cubit of a man.

12And this land we took in possession at that time. From Aroer, which is by the river Arnon, and the half of mount Gilead, and its cities, I gave to the Reubenites and to the Gadites;

13and the rest of Gilead, and all Bashan, the kingdom of Og, I gave to half the tribe of Manasseh. (The whole region of Argob, even all Bashan, is called a land of giants.