2 Samuel 18:8

6So the people went out into the field against Israel; and the battle was in the forest of Ephraim.

7The people of Israel were struck there before David’s servants, and there was a great slaughter there that day of twenty thousand men.

8For the battle was there spread over the surface of all the country, and the forest devoured more people that day than the sword devoured.

9Absalom happened to meet David’s servants. Absalom was riding on his mule, and the mule went under the thick boughs of a great oak; and his head caught hold of the oak, and he was hanging between the sky and earth; and the mule that was under him went on.

10A certain man saw it, and told Joab, and said, “Behold, I saw Absalom hanging in an oak.”