Ezekiel 44:17-19

17And it shall come to pass, 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 headdresses upon their heads, and shall have linen breeches upon their loins; they shall not gird themselves with any thing that causeth sweat.1 19And when they go forth into the outer court, even into the outer court to the people, they shall put off their garments in which they ministered, and lay them in the holy chambers, and they shall put on other garments; and they shall not sanctify the people with their garments.