30 So Joab and Abishai his brother killed Abner, because he had killed their brother Asahel at Gibeon in the battle.
2 Samuel 3:30 Cross References - NHEB
2 Samuel 2:19-23
19 Asahel pursued after Abner, and as he went he did not turn to the right hand nor to the left from following Abner.
20 Then Abner looked behind him, and said, "Is it you, Asahel?" He answered, "It is I."
21 Abner said to him, "Turn aside to your right hand or to your left, and grab one of the young men, and take his armor." But Asahel would not stop from pursuing him.
22 Abner said again to Asahel, "Stop pursuing me. Why should I strike you to the ground? How then should I hold up my face to Joab your brother?"
23 But he refused to stop. Therefore Abner with the back end of the spear struck him in the body, so that the spear came out behind him; and he fell down there, and died in the same place. And it came about that all who came to the place where Asahel had fallen and died, stopped there.
Proverbs 28:17
17 A man who is tormented by life blood will be a fugitive until death; no one will support him.
Acts 28:4
4 When the natives saw the creature hanging from his hand, they said one to another, "No doubt this man is a murderer, whom, though he has escaped from the sea, yet Justice has not allowed to live."