2 Samuel 18:14-18

14Joab 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.

15And ten of Joab’s armor-bearers surrounded Absalom, struck him and killed him. 16Then Joab sounded the trumpet, and the troops stopped pursuing Israel, for Joab halted them.

17They took Absalom, threw him into a big pit in the forest and piled up a large heap of rocks over him. Meanwhile, all the Israelites fled to their homes.

18During his lifetime Absalom had taken a pillar and erected it in the King’s Valley as a monument to himself, for he thought, “I have no son to carry on the memory of my name.” He named the pillar after himself, and it is called Absalom’s Monument to this day.