21. Who smote Abimelech? Abimelech had been foolish enough to approach so close to a tower that he was killed by a piece of millstone thrown by a woman (Judges 9:53). Joab anticipated that he too would be charged with folly for permitting his men to approach so close to the wall as to come within reach of the defenders.
Jerubbesheth. Jerubbaal, or Gideon (Judges 6:32; see on 2 Sam. 2:8; 9:6).
Uriah the Hittite. Joab knew that this was the news that David was anxious to hear and that it would appease David’s possible wrath, atoning for any bad military move that Joab might have made.