When they enter the gates of the inner court, they are to wear linen garments; they must not wear anything made of wool when they minister at the gates of the inner court or inside the temple.
KJV
And 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, whiles they minister in the gates of the inner court, and within.
ASV
And 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.