There we learned: an alleyway higher than twenty cubits, one must lower it. Rabbi Judah says: it is not necessary. And both expounded a single verse: "and he shall slaughter it at the entrance of the Tent of Meeting" (Leviticus 3:2). The Sages hold the sanctity of the Sanctuary is one thing and the sanctity of the vestibule is another; and Rabbi Judah holds the Sanctuary and the vestibule are a single sanctity. And when it writes "the entrance of the Tent of Meeting," it is written about both of them. But when it is written, this is written about the Tabernacle! We find that the Tabernacle is called a sanctuary and the sanctuary is called a Tabernacle. For if you do not say so, that which Rav Judah said in the name of Samuel, that peace-offerings slaughtered before the opening of the doors of the Sanctuary are invalid, since it says "and he shall slaughter it at the entrance," at the time it is open and not at the time it is shut, but that verse is written about the Tabernacle! Rather, the sanctuary is called a Tabernacle.
One Verse Two Rulings on the Open Door of the Sanctuary
Yalkut Shimoni on Torah 460:2
תַּמָּן תָּנִינָן, מָבוֹי שֶׁהוּא גָּבוֹהַּ מֵעֶשְׂרִים אַמָּה יְמַעֵט רַבִּי יְהוּדָה אוֹמֵר, אֵינוֹ צָרִיךְ וּשְׁנֵיהֶם מִקְרָא אֶחָד דָּרְשׁוּ וּשְׁחָטוֹ פֶּתַח אֹהֶל מוֹעֵד, רַבָּנָן סָבְרֵי קְדֻשַּׁת הֵיכָל לְחוּד וּקְדֻשַּׁת אוּלָם לְחוּד וְרַבִּי יְהוּדָה סָבַר הֵיכָל וְאוּלָם חֲדָא קְדֻשָּׁה הִיא, וְכִי כְּתִיב פֶּתַח אֹהֶל מוֹעֵד אַתַּרְוַיְהוּ כְּתִיב, וְהָא כִּי כְתִיב, הַאי בַּמִּשְׁכָּן כְּתִיב, אַשְׁכְּחָן מִשְׁכָּן דְּאִיקְרֵי מִקְדָּשׁ וּמִקְדָּשׁ דְּאִיקְרֵי מִשְׁכָּן דְּאִי לֹא תֵימָא הָכִי הָא דְּאָמַר רַב יְהוּדָה אָמַר שְׁמוּאֵל, שְׁלָמִים שֶׁשְּׁחָטָן קֹדֶם פְּתִיחַת דַּלְתוֹת הַהֵיכָל פְּסוּלִין, שֶׁנֶּאֱמַר "וּשְׁחָטוֹ פֶּתַח", בִּזְמַן שֶׁהוּא פָּתוּחַ וְלֹא בִּזְמַן שֶׁהוּא נָעוּל, וְהָא הַהוּא בַּמִּשְׁכָּן כְּתִיב, אֶלָּא מִקְדָּשׁ אִיקְרֵי מִשְׁכָּן.