2 Samuel 3:26 WEB

²⁴  Then Joab came to the king, and said, What have you done? behold, Abner came to you; why is it that you have sent him away, and he is quite gone?

²⁵  You know Abner the son of Ner, that he came to deceive you, and to know your going out and your coming in, and to know all that you do.

²⁶  When Joab was come out from David, he sent messengers after Abner, and they brought him back from the well of Sirah: but David didn't know it.

²⁷  When Abner was returned to Hebron, Joab took him aside into the midst of the gate to speak with him quietly, and struck him there in the body, so that he died, for the blood of Asahel his brother.

²⁸  Afterward, when David heard it, he said, I and my kingdom are guiltless before Yahweh forever of the blood of Abner the son of Ner: