Ezekiel 42:13-14

13Then said he to me, The north chambers and the south chambers, which are before the separate place, they are holy chambers, where the priests that approach to the LORD shall eat the most holy things: there shall they lay the most holy things, and the meat offering, and the sin offering, and the trespass offering; for the place is holy. 14When the priests enter in it, then shall they not go out of the holy place into the outer court, but there they shall lay their garments in which they minister; for they are holy; and shall put on other garments, and shall approach to those things which are for the people.