Deuteronomy 3:3-16

³ So the Lord our God also delivered into our hands Og king of Bashan, with all his people, and we attacked him until he had no survivors remaining. ⁴ And we took all his cities at that time; there was not a city which we did not take from them: sixty cities, all the region of Argob, the kingdom of Og in Bashan. ⁵ All these cities were fortified with high walls, gates, and bars, besides a great many rural towns. ⁶ And we utterly destroyed them, as we did to Sihon king of Heshbon, utterly destroying the men, women, and children of every city. ⁷ But all the livestock and the spoil of the cities we took as booty for ourselves. ⁸ And at that time we took the land from the hand of the two kings of the Amorites who were on this side of the Jordan, from the River Arnon to Mount Hermon ⁹ (the Sidonians call Hermon Sirion, and the Amorites call it Senir), ¹⁰ all the cities of the plain, all Gilead, and all Bashan, as far as Salcah and Edrei, cities of the kingdom of Og in Bashan. ¹¹ For only Og king of Bashan remained of the remnant of the giants. Indeed his bedstead was an iron bedstead. (Is it not in Rabbah of the people of Ammon?) Nine cubits is its length and four cubits its width, according to the standard cubit.

Reuben, Gad, and Half of Manasseh Settle East of the Jordan

¹² "And this land, which we possessed at that time, from Aroer, which is by the River Arnon, and half the mountains of Gilead and its cities, I gave to the Reubenites and the Gadites. ¹³ The rest of Gilead, and all Bashan, the kingdom of Og, I gave to half the tribe of Manasseh. (All the region of Argob, with all Bashan, was called the land of the giants. ¹⁴ Jair the son of Manasseh took all the region of Argob, as far as the border of the Geshurites and the Maachathites, and called Bashan after his own name, Havoth Jair, to this day.) ¹⁵ Also I gave Gilead to Machir. ¹⁶ And to the Reubenites and the Gadites I gave from Gilead as far as the River Arnon, the middle of the river as the border, as far as the River Jabbok, the border of the people of Ammon;