Ezekiel 42:13-14

13Then he said to me, “The north and south rooms facing the temple courtyard are the priests’ rooms, where the priests who approach the Lord will eat the most holy offerings. There they will put the most holy offerings—the grain offerings, the sin offerings and the guilt offerings—for the place is holy. 14Once the priests enter the holy precincts, they are not to go into the outer court until they leave behind the garments in which they minister, for these are holy. They are to put on other clothes before they go near the places that are for the people.”