2 Samuel 18:9-10

Then Absalom happened to meet David’s troops. As Absalom was riding his mule, it went under the thick branches of a large oak tree. Absalom’s head got caught in the tree, and his mule ran out from under him. So Absalom was left hanging above the ground. When one of the men saw it happen, he told Joab, “I saw Absalom hanging in an oak tree!”