2 Samuel 4:5-7

5So the sons of Rimmon the Beerothite, Rechab and Baanah, left and came to the house of Ish-bosheth in the heat of the day while he was taking his midday rest.

6They came into the interior of the house as if to get wheat [for the soldiers], and they struck him in the stomach. Then Rechab and Baanah his brother escaped [unnoticed].

7Now when they entered the house he was lying on his bed in his bedroom. They [not only] struck and killed him, [but] they also beheaded him. Then they took his head and traveled all night by way of the Arabah.