2 Samuel 3:26-28

Young's Literal Translation

²⁶ And Joab goeth out from David, and sendeth messengers after Abner, and they bring him back from the well of Sirah, and David knew not.

²⁷ And Abner turneth back to Hebron, and Joab turneth him aside unto the midst of the gate to speak with him quietly, and smiteth him there in the fifth [rib] -- and he dieth -- for the blood of Asahel his brother.

²⁸ And David heareth afterwards and saith, `Acquitted [am] I, and my kingdom, by Jehovah, unto the age, from the blood of Abner son of Ner;