2 Samuel 3:26-28
26 Then Joab sent messengers to catch up with Abner and tell him to come back. They found him at the well of Sirah and he returned with them; but David knew nothing about it. 27 When Abner arrived at Hebron, Joab took him aside at the city gate as if to speak with him privately; but then he pulled out a dagger and killed him in revenge for the death of his brother Asahel.
28 When David heard about it he declared, “I vow by the Lord that I and my people are innocent of this crime against Abner.Read full chapter