2 Samuel 4:11-12

11How much more when wicked men kill a righteous man in his own house on his own bed! So now, should I not require his blood from you and purge you from the earth?”

12So David gave orders to the young men, and they killed Rechab and Baanah. They cut off their hands and feet and hung their bodies by the pool in Hebron, but they took Ish-bosheth’s head and buried it in Abner’s tomb in Hebron.