For all the people and all Israel understood that day,.... Not the people of Judah only, but of Israel also, to whom the knowledge of these things came; they knew and were satisfied by his conduct and behaviour, by his words and actions:

that it was not of the king to slay Abner the son of Ner; it was not by the counsel or advice of the king, as the Targum; it was without his knowledge and consent, was contrary to his mind and will; that he had no manner of concern in it, and that if it had been in his power he would have prevented it.

All the people (sc., who were with the king) and all Israel discerned on that day (from David's deep and heartfelt trouble), that the death of Abner had not happened (proceeded) from the king, as many may probably at first have supposed, since Joab had no doubt fetched Abner back in David's name.

For all the people and all Israel understood that day that it was not of the king to slay Abner the son of Ner.

3:22-39 Judgments are prepared for such scorners as Abner; but Joab, in what he did, acted wickedly. David laid Abner's murder deeply to heart, and in many ways expressed his detestation of it. The guilt of blood brings a curse upon families: if men do not avenge it, God will. It is a sad thing to die like a fool, as they do that any way shorten their own days, and those who make no provision for another world. Who would be fond of power, when a man may have the name of it, and must be accountable for it, yet is hampered in the use of it? David ought to have done his duty, and then trusted God with the issue. Carnal policy spared Joab. The Son of David may long delay, but never fails to punish impenitent sinners. He who now reigns upon the throne of David, has a kingdom of a nobler kind. Whatever He doeth, is noticed by all his willing people, and is pleasing to them.