Ezekiel 44:17-19

17It will be that when they enter in at the gates of the inner court, they will be clothed with linen garments. No wool will come on them, while they minister in the gates of the inner court, and within.

18They will have linen turbans upon their heads and linen underclothes upon their loins; they will not wear anything that causes sweat.

19Before they go out to the outer court—to the outer courtyard to the people—they must take off their garments in which they minister and leave them in the holy chambers. They will put on other garments, so they do not consecrate the people while in their garments.