After six years the high priest Jehoiada, husband of Jehosheba, finally makes his move to dethrone Athaliah and enthrone the legitimate and sole Davidic heir, Joash. It is Jehoiada who controls the plot from beginning to end, his success signaled by the closing note in 23:21 that the city is quiet because Athaliah has been slain. Jehoiada gathers help from sacred and secular groups to overthrow Athaliah at the time of the changing of the guard at the temple. It will be the weapons David gave to the temple treasury that will grant military resources to Jehoiada to preserve the Davidic dynasty. In this passage one can discern the rituals …
Baker Publishing Group, The Baker Illustrated Bible Commentary, by Gary M. Burge