2 Samuel 3:20

Twenty men with him. These, we may feel sure, were not common soldiers, but chieftains selected from those elders who were on David's side; and, though the honourable escort of Michal was the pretext, yet Ishbosheth must have felt sure that more was intended. Most of them, however, would join Abner on the road, especially those who represented Benjamin and the western tribes. On arriving at Hebron they were honourably received, and, after a feast, they settled the conditions on which David was to be made king of all Israel; and Abner then departed in peace, after giving the assurance that all the tribes would now gladly assemble, and by solemn compact and covenant make David their king. The terms of the league, and the conditions agreed upon for Ishbosheth, are not mentioned, because upon Abner's death the whole plan fell to the ground, and David had to wait for many years before his hopes were fulfilled. But we gather from this covenant and 2 Samuel 5:3 (where see note) that the early kings of Israel were not absolute monarchs.