2 Samuel 18:17-18

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.