Ezekiel 42:13-14

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