Ezekiel 44:17-19

17And it shall come to pass when they enter in at the gates of the inner court, they shall be clothed with linen garments; and no wool shall come upon them, when they minister in the gates of the inner court, and towards the house.

18They shall have linen tires upon their heads, and shall have linen breeches upon their loins; they shall not gird on anything that causeth sweat.

19And when they go forth into the outer court, into the outer court to the people, they shall put off their garments wherein they ministered, and lay them in the holy cells; and they shall put on other garments, that they may not hallow the people with their garments.