2 Samuel 18:6-8

Revised Standard Version

⁶ So the army went out into the field against Israel; and the battle was fought in the forest of E′phraim. ⁷ And the men of Israel were defeated there by the servants of David, and the slaughter there was great on that day, twenty thousand men. ⁸ The battle spread over the face of all the country; and the forest devoured more people that day than the sword.