2 Samuel 18:17-18

17And they took Absalom, and cast him into a great pit in the wood, and raised a very great heap of stones upon him. And all Israel fled every one to his tent.

18Now Absalom in his lifetime had taken and reared up for himself a monument, which is in the king's dale; for he said, I have no son to keep my name in remembrance; and he called the monument after his own name; and it is called unto this day, Absalom's memorial.