Slew... had slain. — The words are different in Hebrew, the former denoting violence. Translate the latter had put to death. By this strong disapproval of Joab’s act, David shows that it was done without his knowledge or consent. He still remains at fault, however, for continuing Joab in his high and responsible position; but this seems to have been the result of inability to inflict proper punishment upon so powerful a subject, an inability which David on his death-bed sought to remedy by his charge to Solomon. (See 2 Samuel 3:39; 1 Kings 2:5.)
Related Commentaries of 2 Samuel 3:30
2 Samuel 3:30
30 So Joab and Abishai his brother slew Abner, because he had slain their brother Asahel at Gibeon in the battle.