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 the hill-country shall be thine; for though it is a forest, thou shalt cut it down, and the goings out thereof shall be thine; for thou shalt drive out the Canaanites, though they have chariots of iron, and though they are strong.
Joshua 17:15
And 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.
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 said, Ye are fugitives of Ephraim, ye Gileadites, in the midst of Ephraim, and in the midst of Manasseh.