2 Samuel 1:15-16

1:15 Then David called one of the soldiers and said, “Come here and strike him down!” So he struck him down, and he died. 1:16 David said to him, “Your blood be on your own head! Your own mouth has testified against you, saying ‘I have put the Lord’s anointed to death.’”

2 Samuel 4:10-12

4:10 when someone told me that Saul was dead – even though he thought he was bringing good news – I seized him and killed him in Ziklag. That was the good news I gave to him! 4:11 Surely when wicked men have killed an innocent man as he slept in his own house, should I not now require his blood from your hands and remove you from the earth?”

4:12 So David issued orders to the soldiers and they put them to death. Then they cut off their hands and feet and hung them near the pool in Hebron. But they took the head of Ish-bosheth and buried it in the tomb of Abner in Hebron.