1 Kings 2:31-33

31The king replied, ‘Do as Joab said. Kill him there and bury him. He has killed people who did not deserve to die. Punish Joab with death. Then I and my father's family will no longer be guilty for the cruel murders that he has done.

32The Lord will now punish him because of the murders that he did. He used his sword to attack and kill two men, but he did not tell my father David about it. He murdered Ner's son Abner, the leader of Israel's army. He also murdered Jether's son Amasa, the leader of Judah's army. Both those men were better and more honest than Joab was.

33Joab and his descendants will always receive the punishment for those murders. But the Lord will cause David's descendants, his family and his kingdom to enjoy peace always.’