Then he stabbed Abner in the stomach and killed him in revenge - 2 Samuel 3:27
Revenge cost both parties dearly
Joab enjoyed success in the military - becoming the top general
He failed because he used his position to settle old scores
Joah lured Abner to the gate of Hebron and murdered him
His revenge came at a steep price, David praise Abner and cursed Joab and his family - 2 Samuel 3:28-29
Joab lost an important part of himself, he planted seeds of his own destruction - 1 Kings 2:5-6
When someone does you wrong, make it your business to forgive and move on so you don't miss out on good things God has placed before you.