2 Samuel 2:26

Abner called to Joab. — It may be that Abner was already considering the expediency of transferring his allegiance to the house of David, or, at least, had had enough experience of Ish-bosheth to see that it would be impossible to unite the tribes under his sway. At all events, his sense of the disastrous effects of civil war was doubtless quickened by his own defeat and present danger.