Jehoiada - took a chest - This chest was at first set beside the altar, as is here mentioned; but afterwards, for the convenience of the people, it was set without the gate; see 2 Chronicles 24:8.
The priests that kept the door - The north door into the priests‘ court Ezekiel 40:35-43 seems to be intended, not the door of the temple building. The chest must have been placed a little to the right of this north door, between it and the altar of burnt-offering, so that the people could see it from the doorway. The people were not ordinarily allowed to go within the doorway into this court, which belonged to the priests and Levites only.