Joshua 17:14-15

14Then the children of Joseph spoke to Joshua saying: “Why have you given us only one allotment and one portion for an inheritance? For we are a numerous people whom Adonai has thus far blessed?”

15So Joshua said to them, “If you have so many people, go you up to the forest and clear a place for yourself there in the land of the Perizzites and the Rephaim, since the hill country of Ephraim is too narrow for you.”