2 Samuel 3:26-28
Amplified Bible, Classic Edition
26 When Joab came from seeing David, he sent messengers after Abner, and they brought him back from the well of Sirah; but David did not know it.
27 And when Abner returned to Hebron, Joab took him aside to the center of the gate to speak to him privately, and there he smote Abner in the abdomen, so that he died to avenge the blood of Asahel, Joab’s brother.
28 When David heard of it, he said, I and my kingdom are guiltless before the Lord forever of the blood of Abner son of Ner.Read full chapter