Treasury of Scripture Knowledge

Summary

So Joab and Abishai his brother slew Abner, because he had slain their brother Asahel at Gibeon in the battle.

Because

Bible References

Slew abner

Proverbs 28:17
A man that does violence to the blood of any person shall flee all the way to the grave, and no one shall sustain 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 has escaped the sea, yet vengeance does not suffer him to live.

Because

2 Samuel 2:19
And Asahel pursued after Abner, and in going he turned not to the right hand nor to the left from following Abner.