2 Samuel 3:26-30 - Joab Murders Abner
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; 29 it doth stay on the head of Joab, and on all the house of his father, and there is not cut off from the house of Joab one having an issue, and leprous, and laying hold on a staff, and falling by a sword, and lacking bread.' 30 And Joab and Abishai his brother slew Abner because that he put to death Asahel their brother, in Gibeon, in battle.