וְהָיָ֗ה בְּבוֹאָם֙ אֶֽל־שַׁעֲרֵי֙ הֶחָצֵ֣ר הַפְּנִימִ֔ית בִּגְדֵ֥י פִשְׁתִּ֖ים יִלְבָּ֑שׁוּ וְלֹֽא־יַעֲלֶ֤ה עֲלֵיהֶם֙ צֶ֔מֶר בְּשָֽׁרְתָ֗ם בְּשַׁעֲרֵ֛י הֶחָצֵ֥ר הַפְּנִימִ֖ית וָבָֽיְתָה׃
Rashi on Ezekiel
when they enter the gates of the Inner Court the Inner Sanctum on the Day of Atonement.
Rashi on Ezekiel
and no wool shall be upon them They shall not wear the blue wool that was in the robe and girdle on the Day of Atonement during the service in the Inner Court.