slew Abner
Proverbs 28:17
A man that doeth violence to the blood of any person shall flee to the pit; let no man stay him.
Acts 28:4
And when the barbarians saw the venomous beast hang on his hand, they said among themselves, No doubt this man is a murderer, whom, though he hath escaped the sea, yet vengeance suffereth not to live.
because
2 Samuel 2:19-23
19
And Asahel pursued after Abner; and in going he turned not to the right hand nor to the left from following Abner.
20
Then Abner looked behind him, and said, Art thou Asahel? And he answered, I am.
21
And Abner said to him, Turn thee aside to thy right hand or to thy left, and lay thee hold on one of the young men, and take thee his armour. But Asahel would not turn aside from following of him.
22
And Abner said again to Asahel, Turn thee aside from following me: wherefore should I smite thee to the ground? how then should I hold up my face to Joab thy brother?
23
Howbeit he refused to turn aside: wherefore Abner with the hinder end of the spear smote him under the fifth rib, that the spear came out behind him; and he fell down there, and died in the same place: and it came to pass, that as many as came to the place where Asahel fell down and died stood still.