Numbers 32:33

Then Moses gave their land to them. He gave it to the tribes of Gad and Reuben and half of the tribe of Manasseh. Manasseh was Joseph’s son. One part of that land had belonged to the kingdom of Sihon. He was the king of the Amorites. The other part had belonged to the kingdom of Og. He was the king of Bashan. Moses gave that whole land to those two and a half tribes. It included its cities and the territory around them.