Joshua 17:1, 5-6

The next allotment of land was given to the half-tribe of Manasseh, the descendants of Joseph’s older son. Makir, the firstborn son of Manasseh, was the father of Gilead. Because his descendants were experienced soldiers, the regions of Gilead and Bashan on the east side of the Jordan had already been given to them.

As a result, Manasseh’s total allocation came to ten parcels of land, in addition to the land of Gilead and Bashan across the Jordan River, because the female descendants of Manasseh received a grant of land along with the male descendants. (The land of Gilead was given to the rest of the male descendants of Manasseh.)