Abner didn’t want to hurt Asahel, so he said to Asahel, “Stop chasing me—go after one of the young soldiers. You could easily take his armor for yourself.” But Asahel refused to stop chasing Abner.
But you must be strong and brave about obeying the commands my servant Moses gave you. If you follow his teachings exactly, you will be successful in everything you do.
When Abner arrived at Hebron, Joab met him in the gateway, pulled him aside to talk in private, and then stabbed him in the stomach. So he got his revenge against Abner. Joab killed Abner because Abner had killed Joab’s brother Asahel.