דברי הימים ב, פרק כ״ג, פסוק ח׳

A crucial moment in the crowning of a new king requires an overwhelming security presence to ensure the operation's success. Jehoiada the priest orchestrates a strategic gathering of loyal forces, relying heavily on the Levites and the people of Judah. Under his direction, the commanders of hundreds assemble their men, executing the plan flawlessly [מצודת דוד]. The primary focus of this security detail falls upon the Levites, as their specific role positions them as the inner guards stationed directly within the Temple grounds [מלבי"ם].

To assemble an unusually large protective force, Jehoiada takes advantage of the established Temple schedules. Ever since the era of King David, the Temple service operated on a system of rotating divisions, with groups of workers taking turns in shifts [רד"ק, מצודת ציון]. Ordinarily, the Sabbath day marks the transition between these groups: the outgoing shift completes its service and returns home, making way for the incoming shift to begin its duties [ביאור שטיינזלץ].

However, during this critical event, Jehoiada alters the routine by keeping the outgoing workers on duty instead of releasing them [רש"י, מצודת ציון]. Commentators agree that by holding back the departing shift and combining them with the newly arriving workers, Jehoiada effectively doubles his available manpower. This tactical move significantly bolsters the number of supporters on hand, guaranteeing maximum protection for the young king [רד"ק, ביאור שטיינזלץ].