2 Samuel 3:26-28 Complete Jewish Bible (CJB)
26 After leaving David, Yo’av sent messengers after Avner, and they brought him back from the water cistern at Sirah without David’s knowledge. 27 Upon Avner’s return to Hevron, Yo’av took him aside into the space between the outer and inner city gates as if to speak with him privately; and there he struck him in the groin, so that he died — thus avenging the death of ‘Asah’el his brother.
28 Afterwards, when David heard of it, he said, “I and my kingdom are forever innocent of the death of Avner the son of Ner.
2 Samuel 3:26-28 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.