Who stabbed absalom?

Absalom was stabbed by Joab, the commander of King David's army. During a battle between David's forces and Absalom's supporters, Joab found Absalom hanging from a tree by his hair and, despite David's orders to spare him, Joab killed him to prevent further conflict. Joab's actions were motivated by loyalty to David and the need to quell the rebellion led by Absalom.