Ezekiel 42:13-14

13Then he said to me, “The north chambers and the south chambers, which are before the separate area, they are the holy chambers, where the kohanim who are near to Adonai eat the most holy things. There they will put the most holy things—the grain offering, the sin offering and the guilt offering—for the place is holy.

14Once the kohanim enter, they are not to go out of the holy place into the outer court without leaving there their garments in which they minister—for they are holy. They will put on other garments and approach the area for the people.”