Joshua 17:15-16

15And Joshua said unto them, If thou be a great people, get thee up to the forest, and cut down for thyself there in the land of the Perizzites and of the Rephaim; since the hill country of Ephraim is too narrow for thee.

16And the children of Joseph said, The hill country is not enough for us: and all the Canaanites that dwell in the land of the valley have chariots of iron, both they who are in Beth-shean and her towns, and they who are in the valley of Jezreel.