Abner said, I will gather all Israel unto my lord the king How empty and ill founded are the purposes of vain man! Abner, who here promises kingdoms, soon found that he could not ensure to himself one hour of life. David had sent him away, and he departed in peace; but, Behold, the servants of David and Joab came from pursuing a troop In those times of distraction between Judah and Israel, we may well think their neighbours, who were enemies to both, namely, the Philistines, Edomites, Moabites, and others, made many inroads upon the country to get spoil. Joab, however, and the valiant men about David, watched to prevent this, and at this time had overtaken a company of them, in their return home, and recovered a great booty from them.
Related Commentaries of 2 Samuel 3:21
2 Samuel 3:21-22
21 And Abner said unto David, I will arise and go, and will gather all Israel unto my lord the king, that they may make a league with thee, and that thou mayest reign over all that thine heart desireth. And David sent Abner away; and he went in peace.
22 And, behold, the servants of David and Joab came from pursuing a troop, and brought in a great spoil with them: but Abner was not with David in Hebron; for he had sent him away, and he was gone in peace.