1 Kings 2:4-6

4If you do this, then the Lord will keep the promise he made to me. He told me, ‘If your descendants live as they should and follow me faithfully with all their heart and soul, one of them will always sit on the throne of Israel.’

5“And there is something else. You know what Joab son of Zeruiah did to me when he murdered my two army commanders, Abner son of Ner and Amasa son of Jether. He pretended that it was an act of war, but it was done in a time of peace, staining his belt and sandals with innocent blood.

6Do with him what you think best, but don’t let him grow old and go to his grave in peace.