Ezekiel 44:17-19

17And it shall be that, 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, while they minister in the gates of the inner court, and within. 18They shall have linen tires upon their heads, and shall have linen breeches upon their loins; they shall not gird themselves with anything that causeth sweat. 19And when they go forth into the outer court, even into the outer court to the people, they shall put off their garments wherein they minister, and lay them in the holy chambers; and they shall put on other garments, that they sanctify not the people with their garments.