Ezekiel 44:17-19

17When they enter the gates of the inner court, they are to wear linen garments; they must not wear anything made of wool when they minister at the gates of the inner court or inside the temple. 18They are to wear linen turbans on their heads and linen undergarments around their waists. They must not wear anything that makes them perspire.

19When they go out to the outer court, to the people, they are to take off the garments in which they have ministered, leave them in the holy chambers, and dress in other clothes so that they do not transmit holiness to the people with their garments.