Numbers 32:33-34

33So Moses gave to them all the kingdom of Sihon, king of the Amorites and Og, the king of Bashan. He gave to them the land with its towns and all the land round the towns. He gave it to the descendants of Gad and of Reuben and half of the tribe of Joseph's son Manasseh.

34The men in the tribe of Gad built up again Dibon, Ataroth and Aroer.