31 David said to Joab, and to all the people who were with him, Tear your clothes, and gird yourselves with sackcloth, and mourn before Abner. King David followed the bier. 32 They buried Abner in Hebron: and the king lifted up his voice, and wept at the grave of Abner; and all the people wept. 33 The king lamented for Abner, and said, “Should Abner die as a fool dies? 34 Your hands were not bound, nor your feet put into fetters. As a man falls before the children of iniquity, so you fell.”
All the people wept again over him. 35 All the people came to cause David to eat bread while it was yet day; but David swore, saying, “God do so to me, and more also, if I taste bread, or anything else, until the sun goes down.” 36 All the people took notice of it, and it pleased them; as whatever the king did pleased all the people. 37 So all the people and all Israel understood that day that it was not of the king to kill Abner the son of Ner. 38 The king said to his servants, “Don’t you know that there a prince and a great man has fallen this day in Israel? 39 I am this day weak, though anointed king; and these men the sons of Zeruiah are too hard for me. May Yahweh reward the evildoer according to his wickedness.”
Matthew Henry's Commentary on 2 Samuel 3:31-39
Commentary on 2 Samuel 3:22-39
(Read 2 Samuel 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.