Ezekiel 44:17-19

17When they enter the gates of the inner court, they shall wear linen garments. They shall have nothing of wool on them, while they minister at the gates of the inner court, and within.

18They shall have linen turbans on their heads, and linen undergarments around their waists. They shall not bind themselves with anything that causes sweat.

19And when they go out into the outer court to the people, they shall put off the garments in which they have been ministering and lay them in the holy chambers. And they shall put on other garments, lest they transmit holiness to the people with their garments.