Jehoiada the priest arms the military captains with ancient weapons stored within the Temple. This action is not merely a logistical step to prepare for battle, but a moment carrying deep symbolic weight. Among the equipment handed out are specific types of shields [מצודת ציון, ביאור שטיינזלץ]. These are no ordinary arms; they are weapons that belonged to King David himself, which he personally crafted [מצודת דוד].
For generations, these items were kept safely inside the Temple [מצודת דוד]. The Temple complex contained a large treasury dedicated to preserving objects of significant historical value [ביאור שטיינזלץ]. Even though these weapons were ancient, they remained in excellent condition and were fully capable of being used in actual combat.
By placing King David's personal weapons into the hands of the captains, Jehoiada does more than simply supply them with military gear. He delivers a powerful ideological message. Holding these historic arms serves to remind the leaders that the enduring legacy of the House of David is now entrusted directly to their care and protection [ביאור שטיינזלץ].