Ezekiel 42:13-14

42:13 Then he said to me, “The north chambers and the south chambers which face the courtyard are holy chambers where the priests who approach the Lord will eat the most holy offerings. There they will place the most holy offerings – the grain offering, the sin offering, and the guilt offering, because the place is holy. 42:14 When the priests enter, then they will not go out from the sanctuary to the outer court without taking off their garments in which they minister, for these are holy; they will put on other garments, then they will go near the places where the people are.”

Leviticus 6:10-11

6:10 Then the priest must put on his linen robe and must put linen leggings over his bare flesh, and he must take up the fatty ashes of the burnt offering that the fire consumed on the altar, and he must place them beside the altar. 6:11 Then he must take off his clothes and put on other clothes, and he must bring the fatty ashes outside the camp to a ceremonially clean place,