2 Samuel 19:6
In that thou lovest thine enemies, and hatest thy friends. For thou hast declared this day, that thou regardest neither princes nor servants: for this day I perceive, that if Absalom had lived, and all we had died this day, then it had pleased thee well.
Cross-reference
2 Samuel 3:39
Historical context
In 2 Samuel 3:39, David calls Joab (son of Zeruiah) too severe. Here Joab is severe with David, consistent with that characterization.
2 Samuel 3:24
Parallel
In 2 Samuel 3:24, Joab again confronts David about an enemy, mirroring his accusation here that David loves enemies.