2 Samuel 18:6
So the people went out into the field against Israel, and the battle was in the forest of Ephraim,
Joshua 17:18
but that mountain shall be thine, for it is a forest, and thou shalt cut it down, and the borders of it shall be thine; for thou shalt drive out the Canaanite, though he has iron chariots and though he is strong.
Joshua 17:15
And Joshua answered them, If thou art such a great people, then go up to the forest and cut down for thyself there in the land of the Perizzite and of the giants, if mountain of Ephraim is too narrow for thee.
Judges 12:4-6
Then Jephthah gathered together all the men of Gilead and fought with Ephraim; and the men of Gilead smote Ephraim because they had said, Ye are fugitives of Ephraim; ye are Gileadites among Ephraim and Manasseh.