2 Samuel 3:26-28
New Living Translation
26 Joab then left David and sent messengers to catch up with Abner, asking him to return. They found him at the well of Sirah and brought him back, though David knew nothing about it. 27 When Abner arrived back at Hebron, Joab took him aside at the gateway as if to speak with him privately. But then he stabbed Abner in the stomach and killed him in revenge for killing his brother Asahel.
28 When David heard about it, he declared, “I vow by the Lord that I and my kingdom are forever innocent of this crime against Abner son of Ner.Read full chapter