Ezekiel 42:13-14

13Then the man told me, “These rooms that overlook the Temple from the north and south are holy. Here the priests who offer sacrifices to the Lord will eat the most holy offerings. And because these rooms are holy, they will be used to store the sacred offerings—the grain offerings, sin offerings, and guilt offerings.

14When the priests leave the sanctuary, they must not go directly to the outer courtyard. They must first take off the clothes they wore while ministering, because these clothes are holy. They must put on other clothes before entering the parts of the building complex open to the public.”