2 Samuel 4:5-8

Now the sons of Rimmon the Beerothite, Rechab and Baanah, set out, and about the heat of the day they came to the house of Ish-bosheth as he was taking his noonday rest. And they came into the midst of the house as if to get wheat, and they stabbed him in the stomach. Then Rechab and Baanah his brother escaped. When they came into the house, as he lay on his bed in his bedroom, they struck him and put him to death and beheaded him. They took his head and went by the way of the Arabah all night, and brought the head of Ish-bosheth to David at Hebron. And they said to the king, “Here is the head of Ish-bosheth, the son of Saul, your enemy, who sought your life. The LORD has avenged my lord the king this day on Saul and on his offspring.”