David himself had experienced this once (2 Samuel 23:1–14). When he was king, there was a famine that lasted three years. David asked the Lord what was going on and found out that there was still a bloodguilt from the time of his predecessor Saul. He had killed people of a nation who had been promised—even through the making of a covenant—that nothing would happen to them.
31 Le roi dit à Benaja: Fais comme il a dit, frappe-le, et enterre-le; tu ôteras ainsi de dessus moi et de dessus la maison de mon père le sang que Joab a répandu sans cause.