2 Samuel 4:5-7

5Now the sons of Rimmon the Beerothite – Recab and Baanah – went at the hottest part of the day to the home of Ish-bosheth, as he was enjoying his midday rest.

6They entered the house under the pretense of getting wheat and mortally wounded him in the stomach. Then Recab and his brother Baanah escaped.

7They had entered the house while Ish-bosheth was resting on his bed in his bedroom. They mortally wounded him and then cut off his head. Taking his head, they traveled on the way of the Arabah all that night.