2 Samuel 3:26-39 English Standard Version (ESV)
Joab Murders Abner
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.
David Mourns Abner
31 Then David said to Joab and to all the people who were with him, “Tear your clothes and put on sackcloth and mourn before Abner.” And King David followed the bier. 32 They buried Abner at Hebron. And the king lifted up his voice and wept at the grave of Abner, and all the people wept. 33 And the king lamented for Abner, saying,
“Should Abner die as a fool dies?
And all the people wept again over him. 35 Then all the people came to persuade 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 till the sun goes down!” 36 And all the people took notice of it, and it pleased them, as everything that the king did pleased all the people. 37 So all the people and all Israel understood that day that it had not been the king's will to put to death Abner the son of Ner. 38 And the king said to his servants, “Do you not know that a prince and a great man has fallen this day in Israel? 39 And I was gentle today, though anointed king. These men, the sons of Zeruiah, are more severe than I. The Lord repay the evildoer according to his wickedness!”
2 Samuel 3:26-39 New International Version (NIV)
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[a] 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.)
31 Then David said to Joab and all the people with him, “Tear your clothes and put on sackcloth and walk in mourning in front of Abner.” King David himself walked behind the bier. 32 They buried Abner in Hebron, and the king wept aloud at Abner’s tomb. All the people wept also.
33 The king sang this lament for Abner:
“Should Abner have died as the lawless die?
And all the people wept over him again.
35 Then they all came and urged David to eat something while it was still day; but David took an oath, saying, “May God deal with me, be it ever so severely, if I taste bread or anything else before the sun sets!”
36 All the people took note and were pleased; indeed, everything the king did pleased them. 37 So on that day all the people there and all Israel knew that the king had no part in the murder of Abner son of Ner.
38 Then the king said to his men, “Do you not realize that a commander and a great man has fallen in Israel this day? 39 And today, though I am the anointed king, I am weak, and these sons of Zeruiah are too strong for me. May the Lord repay the evildoer according to his evil deeds!”