2 Samuel 3:26-28 New Life Version (NLV)
26 When Joab left David, he sent men after Abner. They brought him back from the well of Sirah. But David did not know it. 27 When Abner returned to Hebron, Joab took him aside into the center of the gate to speak with him alone. There Joab hit him in the stomach and killed him because of the blood of his brother Asahel. 28 When David heard about it, he said, “I and my nation are forever without guilt before the Lord, from the blood of Abner the son of Ner.