2nd Samuel 4:12

6 And Rechab and his brother Baanah got in without being seen.

7 And when they came into the house, Ish-bosheth was stretched on his bed in his bedroom; and they made an attack on him and put him to death, and, cutting off his head, they took it with them and went by the road through the Arabah all night.

8 And they took the head of Ish-bosheth to David in Hebron, and said to the king, Here is the head of Ish-bosheth, the son of Saul your hater, who would have taken your life; the Lord has taken payment for the wrongs of my lord the king from Saul and his seed today.

9 And David made answer to Rechab and his brother Baanah, the sons of Rimmon the Beerothite, and said to them, By the living Lord, who has kept me safe from all my trouble,

10 When one came to me with the news of Saul's death, in the belief that it would be good news, I took him and put him to death in Ziklag, which was the reward I gave him for his news:

11 How much more, when evil men have put an upright person to death, in his house, sleeping on his bed, will I take payment from you for his blood, and have you cut off from the earth?

12 And David gave orders to his young men and they put them to death, cutting off their hands and their feet and hanging them up by the side of the pool in Hebron. But they took the head of Ish-bosheth and put it in its last resting-place with Abner's body in Hebron.