The Battle in the Wood of Ephraim

2 Samuel 18:6-8

So the people went out into the field against Israel: and the battle was in the forest of Ephraim.

The people of Israel were struck there before the servants of David, and there was a great slaughter there that day of twenty thousand men.

For the battle was there spread over the surface of all the country; and the forest devoured more people that day than the sword devoured.