Joshua 17:1, 5-6

Now this was the lot for the tribe of Manasseh, for he was the firstborn of Joseph. To Machir the firstborn of Manasseh, the father of Gilead, were allotted Gilead and Bashan, because he was a man of war.

Thus there fell ten portions to Manasseh, besides the land of Gilead and Bashan, which is beyond the Jordan, because the daughters of Manasseh received an inheritance among his sons. And the land of Gilead belonged to the rest of the sons of Manasseh.