Ezekiel 44:17-19

17It shall be that when they enter the gates of the inner courtyard, they shall be clothed in linen garments; no wool shall be on them while they minister at the gates of the inner courtyard and within the temple (house).

18They shall have linen turbans on their heads and linen undergarments on their loins; they shall not dress themselves with anything which makes them sweat.

19When they go out into the outer court, into the outer courtyard to the people, they shall take off the garments in which they have been ministering and leave them in the holy chambers; then they shall put on other clothing so that they will not transmit holiness to the people with their [ceremonial] garments.