2 Samuel 12:8

I gave … thy master's wives into thy bosom. These words probably mean that, as the whole possessions of his predecessor belonged, by Oriental custom, to the next occupant of the throne, David might have claimed the entire household and the wives both of Saul and Ishbosbeth as his own, though apparently he had not done so. As far as we know, Saul had but one wife ( 1 Samuel 14:50 ) and one concubine, Rizpah ( 2 Samuel 3:7 ). Of Ishbosheth's family arrangements we know little, but his harem, if he had one, would become the property of David. But independently of this, the permission of polygamy had made it possible for him to take any of the daughters of Israel and Judah to wife, and he had freely availed himself of this licence. Yet, not content, he had lusted after a married woman, and had got rid of her husband by murder, meanly using the sword of the Ammonites to accomplish his own criminal purpose. The word used in this clause, and rendered "thou hast slain him," is a very strong one, and literally means "thou hast murdered him," though the sword was that of the enemy.