Related for Kelim 1:9
בֵּין הָאוּלָם וְלַמִּזְבֵּחַ מְקֻדָּשׁ מִמֶּנָּה, שֶׁאֵין בַּעֲלֵי מוּמִין וּפְרוּעֵי רֹאשׁ נִכְנָסִים לְשָׁם. הַהֵיכָל מְקֻדָּשׁ מִמֶּנּוּ, שֶׁאֵין נִכְנָס לְשָׁם שֶׁלֹּא רְחוּץ יָדַיִם וְרַגְלָיִם. קֹדֶשׁ הַקֳּדָשִׁים מְקֻדָּשׁ מֵהֶם, שֶׁאֵין נִכְנָס לְשָׁם אֶלָּא כֹהֵן גָּדוֹל בְּיוֹם הַכִּפּוּרִים בִּשְׁעַת הָעֲבוֹדָה. אָמַר רַבִּי יוֹסֵי, בַּחֲמִשָּׁה דְבָרִים בֵּין הָאוּלָם וְלַמִּזְבֵּחַ שָׁוֶה לַהֵיכָל, שֶׁאֵין בַּעֲלֵי מוּמִין, וּפְרוּעֵי רֹאשׁ, וּשְׁתוּיֵי יַיִן, וְשֶׁלֹּא רְחוּץ יָדַיִם וְרַגְלַיִם נִכְנָסִים לְשָׁם, וּפוֹרְשִׁין מִבֵּין הָאוּלָם וְלַמִּזְבֵּחַ בִּשְׁעַת הַקְטָרָה:
Between the porch and the altar has still higher sanctity, because [priests] with blemishes and loosened hair may not enter there. The sanctuary has higher sanctity, because no one may enter there who has not washed their hands and feet. The holy of holies has greater sanctity than these, because no one may enter there except the High Priest on the Day of Atonement at the time of the service. Rabbi Yose said: In five ways [the area] between the porch and the altar is equal to the sanctuary because [priests] with blemishes, loosened hair, who have consumed wine, and who have not washed their hands and feet may not enter there, and they separate themselves from between the porch and the altar at the time of [the offering of the] incense.