Thematic Bible: David was false to joab

You know also what Joab son of Zeruiah did to me, and what he did to the two captains of the hosts of Israel, Abner son of Ner and Amasa son of Jether, whom he murdered, avenging in time of peace blood shed in war, and putting innocent blood of war on the girdle on his loins and on the sandals of his feet. Do therefore according to your wisdom, but let not his hoary head go down to Sheol (the place of the dead) in peace.