2 Samuel 4:7-8

7When they had gotten within the house, he was lying on his bed in his bedroom, they stabbed him and killed him, then beheaded him and took his head, and traveled by the way of the Arabah all night.

8Then they brought the head of Ish-bosheth to David in Hebron, and said to the king, “Here is the head of Saul’s son Ish-bosheth, your enemy, who sought your life. Today Adonai has avenged my lord the king of Saul and his offspring.”