2 Samuel 18:9-10; 2 Samuel 18:14
Now Absalom happened to meet David's men. He was riding his mule, and as the mule went under the thick branches of a large oak, Absalom's head got caught in the tree. He was left hanging in midair, while the mule he was riding kept on going.
When one of the men saw this, he told Joab, "I just saw Absalom hanging in an oak tree."
Joab said, "I'm not going to wait like this for you." So he took three javelins in his hand and plunged them into Absalom's heart while Absalom was still alive in the oak tree.