2 Samuel 16:11

16:11 Then David said to Abishai and to all his servants, “My own son, my very own flesh and blood, is trying to take my life. So also now this Benjaminite! Leave him alone so that he can curse, for the Lord has spoken to him.

2 Samuel 20:10

20:10 Amasa did not protect himself from the knife in Joab’s other hand, and Joab stabbed him in the abdomen, causing Amasa’s intestines to spill out on the ground. There was no need to stab him again; the first blow was fatal. Then Joab and his brother Abishai pursued Sheba son of Bicri.