2 Samuel 18:9-18
And Ab'salom chanced to meet the servants of David. Ab'salom was riding upon his mule, and the mule went under the thick branches of a great oak, and his head caught fast in the oak, and he was left hanging between heaven and earth, while the mule that was under him went on. And a certain man saw it, and told Jo'ab, "Behold, I saw Ab'salom hanging in an oak."
Jo'ab said to the man who told him, "What, you saw him! Why then did you not strike him there to the ground? I would have been glad to give you ten pieces of silver and a girdle." But the man said to Jo'ab, "Even if I felt in my hand the weight of a thousand pieces of silver, I would not put forth my hand against the king's son; for in our hearing the king commanded you and Abi'shai and It'tai, `For my sake protect the young man Ab'salom.' On the other hand, if I had dealt treacherously against his life (and there is nothing hidden from the king), then you yourself would have stood aloof."
Jo'ab said, "I will not waste time like this with you." And he took three darts in his hand, and thrust them into the heart of Ab'salom, while he was still alive in the oak. And ten young men, Jo'ab's armor-bearers, surrounded Ab'salom and struck him, and killed him. Then Jo'ab blew the trumpet, and the troops came back from pursuing Israel; for Jo'ab restrained them. And they took Ab'salom, and threw him into a great pit in the forest, and raised over him a very great heap of stones; and all Israel fled every one to his own home.
Now Ab'salom in his lifetime had taken and set up for himself the pillar which is in the King's Valley, for he said, "I have no son to keep my name in remembrance"; he called the pillar after his own name, and it is called Ab'salom's monument to this day.