25 You know Abner son of Ner; he came to deceive you and observe your movements and find out everything you are doing." 26 Joab then left David and sent messengers after Abner, and they brought him back from the cistern at Sirah. But David did not know it. 27 Now when Abner returned to Hebron, Joab took him aside into an inner chamber, as if to speak with him privately. And there, to avenge the blood of his brother Asahel, Joab stabbed him in the stomach, and he died. 28 Later, when David heard about this, he said, "I and my kingdom are forever innocent before the Lord concerning the blood of Abner son of Ner. 29 May his blood fall on the head of Joab and on his whole family! May Joab's family never be without someone who has a running sore or leprosy[1] or who leans on a crutch or who falls by the sword or who lacks food." 30 (Joab and his brother Abishai murdered Abner because he had killed their brother Asahel in the battle at Gibeon.)
25 Thou knowest Abner the son of Ner, that he came to deceive thee, and to know thy going out and thy coming in, and to know all that thou doest. 26 And when Joab was come out from David, he sent messengers after Abner, which brought him again from the well of Sirah: but David knew it not. 27 And when Abner was returned to Hebron, Joab took him aside in the gate to speak with him quietly,
25 You know that Abner the son of Ner came to deceive you and to know your going out and your coming in, and to know all that you are doing." 26 When Joab came out from David's presence, he sent messengers after Abner, and they brought him back from the cistern of Sirah. But David did not know about it. 27 And when Abner returned to Hebron, Joab took him aside into the midst of the gate to speak with him privately, and there he struck him in the stomach, so that he died, for the blood of Asahel his brother. 28 Afterward, when David heard of it, he said, "I and my kingdom are forever guiltless before the Lord for the blood of Abner the son of Ner. 29 May it fall upon the head of Joab and upon all his father's house, and may the house of Joab never be without one who has a discharge or who is leprous or who holds a spindle or who falls by the sword or who lacks bread!" 30 So Joab and Abishai his brother killed Abner, because he had put their brother Asahel to death in the battle at Gibeon.
25 You know Abner son of Ner better than that. This was no friendly visit. He was here to spy on you, figure out your comings and goings, find out what you're up to." 26 Joab left David and went into action. He sent messengers after Abner; they caught up with him at the well at Sirah and brought him back. David knew nothing of all this. 27 When Abner got back to Hebron, Joab steered him aside at the gate for a personal word with him. There he stabbed him in the belly, killed him in cold blood for the murder of his brother Asahel. 28 Later on, when David heard what happened, he said, "Before God I and my kingdom are totally innocent of this murder of Abner son of Ner. 29 Joab and his entire family will always be under the curse of this bloodguilt. May they forever be victims of crippling diseases, violence, and famine." 30 (Joab and his brother, Abishai, murdered Abner because he had killed their brother Asahel at the battle of Gibeon.)
25 Surely you realize that Abner the son of Ner came to deceive you, to know your going out and your coming in, and to know all that you are doing." 26 And when Joab had gone from David's presence, he sent messengers after Abner, who brought him back from the well of Sirah. But David did not know it. 27 Now when Abner had returned to Hebron, Joab took him aside in the gate to speak with him privately, and there stabbed him in the stomach, so that he died for the blood of Asahel his brother. 28 Afterward, when David heard it, he said, "My kingdom and I are guiltless before the Lord forever of the blood of Abner the son of Ner. 29 Let it rest on the head of Joab and on all his father's house; and let there never fail to be in the house of Joab one who has a discharge or is a leper, who leans on a staff or falls by the sword, or who lacks bread." 30 So Joab and Abishai his brother killed Abner, because he had killed their brother Asahel at Gibeon in the battle.
25 You know perfectly well that he came to spy on you and find out everything you're doing!" 26 Joab then left David and sent messengers to catch up with Abner, asking him to return. They found him at the well of Sirah and brought him back, though David knew nothing about it. 27 When Abner arrived back at Hebron, Joab took him aside at the gateway as if to speak with him privately. But then he stabbed Abner in the stomach and killed him in revenge for killing his brother Asahel. 28 When David heard about it, he declared, "I vow by the Lord that I and my kingdom are forever innocent of this crime against Abner son of Ner. 29 Joab and his family are the guilty ones. May the family of Joab be cursed in every generation with a man who has open sores or leprosy or who walks on crutches or dies by the sword or begs for food!" 30 So Joab and his brother Abishai killed Abner because Abner had killed their brother Asahel at the battle of Gibeon.
Matthew Henry's Commentary on 2 Samuel 3:25-30
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.