The commandment not to deviate from the sages' ruling is discussed as a Torah-level commandment, reinforcing the obligation to follow the Sanhedrin and authorized rabbinic interpretation.
וְכָתַב הָרַמְבַּ"ם זִכְרוֹנוֹ לִבְרָכָה (ממרים א, ב) בְּעִנְיָן לָאו זֶה דְּלֹא תָסוּר שֶׁאֶחָד דְּבָרִים שֶׁלָּמְדוּ אוֹתָם חֲכָמִים מִפִּי הַקַּבָּלָה, וְאֶחָד הַדְּבָרִים שֶׁלָּמְדוּ אוֹתָן בְּדַעְתָּן בְּאַחַת מִן הַמִּדּוֹת שֶׁהַתּוֹרָה נִדְרֶשֶׁת בָּהֶן, וְאֶחָד דְּבָרִים שֶׁנַּעֲשׂוּ סְיָג לַתּוֹרָה, וְהֵם: הַגְּזֵרוֹת וְהַתַּקָּנוֹת וְהַמִּנְהָגוֹת (עי' רש"י יומא עד א ד"ה ואליבא) בְּכָל אֶחָד מֵהַשְּׁלֹשָׁה דְּבָרִים אֵלּוּ מִצְוַת עֲשֵׂה לִשְׁמֹעַ לָהֶם, וְהָעוֹבֵר עַל כָּל אַחַת מֵהֶם עוֹבֵר בַּעֲשֵׂה וְלֹא תַעֲשֶׂה. וְהָרַמְבַּ"ן זִכְרוֹנוֹ לִבְרָכָה תָּפַשׂ עָלָיו הַרְבֵּה וְאָמַר (בספר המצוות בהשגתו שרש א), הִנֵּה סָבוּר הָרַב שֶׁיֵּשׁ בִּכְלַל לָאו דְּלֹא תָסוּר כָּל מָה שֶׁהוּא מִדִּבְרֵי חֲכָמִים, בֵּין שֶׁהֵן מִצְוֹת דְּרַבָּנָן, כְּגוֹן מִקְרָא מְגִלָּה וְנֵר חֲנֻכָּה, בֵּין שֶׁהֵן מִן הַתַּקָּנוֹת כְּגוֹן בְּשַׂר עוֹף בְּחָלָב וּשְׁנִיּוֹת לָעֲרָיוֹת, בֵּין שֶׁהֵן בְּקוּם עֲשֵׂה, כְּגוֹן שָׁלֹשׁ תְּפִלּוֹת בְּכָל יוֹם וּמֵאָה בְּרָכוֹת וְלוּלָב שִׁבְעָה בַּגְּבוּלִין, וּבֵין שֶׁהֵן בְּלֹא תַּעֲשֶׂה, כְּגוֹן, כָּל שֶׁהוּא מִשּׁוּם שְׁבוּת בְּשַׁבָּת וְיוֹם טוֹב, וְכֵן יוֹם טוֹב שֵׁנִי בַּגּוֹלָה וְתִשְׁעָה בְּאָב, וְדֶרֶךְ כְּלָל כָּל מָה שֶׁיֶּאֱסֹר אוֹתוֹ הַתַּלְמוּד אוֹ יְצַוֶּה עָלָיו. וְהִנֵּה הָרַב בּוֹנֶה חוֹמָה בְּצוּרָה סָבִיב לְדִבְרֵי חֲכָמִים, אֲבָל הִיא כְּפֶרֶץ נֹפֵל נִבְעֶה בְּחוֹמָה נִשְׂגָּבָה אֲשֶׁר פִּתְאֹם לְפֶתַע יָבֹא שִׁבְרָהּ, לְפִי שֶׁהִיא סְבָרָה נִפְסֶדֶת בְּרֹב מְקוֹמוֹת בַּתַּלְמוּד, כִּי הִנֵּה לְדַעְתּוֹ, הַמִּשְׁתַּמֵּשׁ בִּמְחֻבָּר כְּגוֹן הַנִּסְמָךְ עַל הָאִילָן בְּשַׁבָּת, אוֹ הַמְטַלְטֵל מֵחַמָּה לְצֵל, אוֹ שֶׁאָמַר לַגּוֹי וְעָשָׂה, אוֹ אֲפִלּוּ הַמַּפְסִיעַ פְּסִיעָה גַּסָּה בְּשַׁבָּת, עוֹבֵר הוּא עַל עֲשֵׂה וְלֹא תַעֲשֶׂה מִן הַתּוֹרָה וְרָאוּי הוּא לִלְקוֹת אַרְבָּעִים, אֶלָּא שֶׁפְּטָרוֹ הָרַב שָׁם בְּסֵפֶר שׁוֹפְטִים, מִפְּנֵי שֶׁנִּתַּן לְאַזְהָרַת מִיתַת בֵּית דִּין, שֶׁכָּל חָכָם שֶׁמַּמְרֶה עַל דִּבְרֵיהֶם מִיתָתוֹ בְּחֶנֶק. וְהִנֵּה לִדְבָרָיו לוֹקֶה הוּא לְדַעַת הָאוֹמֵר בַּתַּלְמוּד לָאו שֶׁנִּתַּן לְאַזְהָרַת מִיתַת בֵּית דִין לוֹקִין עָלָיו, כְּמוֹ שֶׁהֻזְכַּר בְּפֶרֶק מִי שֶׁהֶחְשִׁיךְ (שבת קנד, ב). וְרָאוּי לְפִי הַדַּעַת הַזֹּאת לְהַחְמִיר מְאֹד בְּדִבְרֵי סוֹפְרִים שֶׁכֻּלָּם תּוֹרָה הֵם, אֵין בֵּינֵיהֶם וּבֵין הַמִּצְוֹת הַמְפֹרָשׁוֹת בַּכָּתוּב שׁוּם הֶפְרֵשׁ, וְאֵין בַּתּוֹרָה דָּבָר חָמוּר מִן הַשְּׁבוּת שֶׁהוּא מִדִּבְרֵיהֶם אֶלָּא מָה שֶׁיֵּשׁ בָּהּ חִיּוּב כָּרֵת אוֹ מִיתַת בֵּית דִּין, אֲבָל לֹא כָּל שֶׁיֵּשׁ בָּהּ חִיּוּב עֲשֵׂה אוֹ לָאו, שֶׁהֲרֵי בְּכָל דִּבְרֵיהֶם לְדַעְתּוֹ יֵשׁ חִיּוּב עֲשֵׂה וְלָאו, עֲשֵׂה דִּוְעָשִׂיתָ עַל פִּי הַדָּבָר אֲשֶׁר יַגִּידוּ לְךָ, וְלָאו דְּלֹא תָסוּר. וְהִנֵּה נִרְאֶה לְרַבּוֹתֵינוּ בְּכָל הַגְּמָרָא אוֹמְרִים הֶפֶךְ מִזֶּה, שֶׁהֲרֵי הֵם דָּנִים כָּל דִּבְרֵי סוֹפְרִים לְהָקֵל, כְּמוֹ שֶׁיֹּאמְרוּ תָּמִיד (ביצה ג ב) סְפֵקָא דְּאוֹרָיְתָא לְחֻמְרָא, סְפֵקָא דְּרַבָּנָן לְקֻלָּא, וְהֵקֵלּוּ בַּחֲשַׁשׁ אִסּוּרִין שֶׁל דִּבְרֵיהֶם לוֹמַר בָּהֶם שֶׁאֲנִי אוֹמֵר. וְאָמְרוּ בְּפֶרֶק רִאשׁוֹן מִפְּסָחִים (ט ב) אֵמוּר דְּאָמְרִינַן שֶׁאֲנִי אוֹמֵר בִּדְרַבָּנָן, בִּדְאוֹרָיְתָא מִי אָמְרִינַן שֶׁאֲנִי אוֹמֵר? וְהֶאֱמִינוּ הַקְּטַנִּים שֶׁאֵינָם רְאוּיִים לְהָעִיד בְּמָה שֶׁהוּא מִדְּרַבָּנָן, כְּמוֹ שֶׁאָמְרוּ שָׁם (ד ב) בְּדִיקַת חָמֵץ דְּרַבָּנָן, וְהֵימְנִינְהוּ רַבָּנָן בִּדְרַבָּנָן. וְכֵן בְּעִנְיַן תְּחוּמִין נֶאֱמָן הַקָּטָן לוֹמַר עַד כָּאן תְּחוּם שַׁבָּת, קָסָבַר תְּחוּמִין דְּרַבָּנָן, וְהֵימְנִינְהוּ רַבָּנָן בִּדְרַבָּנָן, כִּדְאִיתָא בְּעֵרוּבִין (נח ב) וּבִכְתֻבּוֹת (כח ב). וְעוֹד הֵקֵלּוּ בִּדְרַבָּנָן כְּמוֹ כֵן בִּסְפֵקוֹת, כְּמוֹ שֶׁאָמְרוּ זִכְרוֹנָם לִבְרָכָה (ברכות כא, א) סָפֵק הִתְפַּלֵּל סָפֵק לֹא הִתְפַּלֵּל אֵינוֹ חוֹזֵר וּמִתְפַּלֵּל, סָפֵק אָמַר אֱמֶת וְיַצִּיב סָפֵק לֹא אָמַר חוֹזֵר, וְאָמְרוּ מַאי טַעְמָא? תְּפִלָּה דְּרַבָּנָן, אֱמֶת וְיַצִּיב דְּאוֹרָיְתָא, וְלֹא עוֹד אֶלָּא אֲפִלּוּ בִּדְבָרִים הַסּוֹתְרִין זֶה אֶת זֶה הֵקֵלּוּ, כְּמוֹ שֶׁאָמְרוּ בְּפֶרֶק בַּמֶּה מַדְלִיקִין (שבת לד, א) אָמְרוּ לוֹ שְׁנַיִם צֵא וְעָרֵב עָלֵינוּ, אֶחָד עֵרֵב עָלָיו מִבְּעוֹד יוֹם וְכוּ', כְּמוֹ שֶׁבָּא לְשָׁם. וְגַם נִרְאֶה בַּגְּמָרָא, שֶׁעוֹקְרִין דִּבְרֵיהֶם תָּדִיר מִשּׁוּם אִסּוּר דְּאוֹרָיְתָא, כְּמוֹ שֶׁאָמְרוּ בְּמַסֶּכֶת שַׁבָּת (ד א), הִדְבִּיק פַּת בַּתַּנּוּר הִתִּירוּ לוֹ לִרְדּוֹתָהּ קֹדֶם שֶׁיָּבוֹא לִידֵי אִסּוּר סְקִילָה. וְשָׁם בְּשַׁבָּת (קכח ב) אָמְרוּ, בִּטּוּל כְּלִי מֵהֲכֵנוֹ דְּרַבָּנָן, וְצַעַר בַּעֲלֵי חַיִּים דְּאוֹרָיְתָא, וְאָתֵי דְּאוֹרָיְתָא וּמְבַטֵּל דְּרַבָּנָן וְכוּ', כְּמוֹ שֶׁבָּא לְשָׁם, וְזֶה רַב מְאֹד בַּתַּלְמוּד אָתֵי עֲשֵׂה דְּאוֹרָיְתָא וְדָחֵי עֲשֵׂה דְּרַבָּנָן. וְכֵן בְּמַחְלֹקֶת שֶׁתָּבוֹא בֵּין הַחֲכָמִים אָמְרוּ (ע"ז ז, א) אִם הָיָה אֶחָד גָּדוֹל בְּחָכְמָה וּבְמִנְיָן הַלֵּךְ אַחֲרָיו, וְאִם לָאו בְּשֶׁל תּוֹרָה, הַלֵּךְ אַחַר הַמַּחְמִיר, וּבְשֶׁל סוֹפְרִים אַחַר הַמֵּקֵל, וּגְדוֹלָה מִזֶּה אָמְרוּ (ערובין סז, ב) בְּשֶׁל סוֹפְרִים עוֹשִׂין מַעֲשֶׂה וְאַחַר כָּךְ דָּנִין. וּבְפֶרֶק מִי שֶׁהֶחְשִׁיךְ (שבת קנד, ב) אָמְרוּ מַהוּ דְּתֵימָא לְהֶפְסֵד מוּעָט נָמֵי חָשְׁשׁוּ קָא מַשְׁמַע לַן, שֶׁהֲרֵי חִדּוּשׁ הוּא אֶצְלָם כְּשֶׁאֵינָן דּוֹחִין דִּבְרֵי סוֹפְרִים אֲפִלּוּ לְהֶפְסֵד מוּעָט. וְאָמְרוּ (ברכות יט, ב) שֶׁמְּטַמְּאִין כֹּהֲנִים עַצְמָם בְּטֻמְאָה שֶׁל דִּבְרֵיהֶם לִרְאוֹת מַלְכֵי אֻמּוֹת הָעוֹלָם כְּדֵי שֶׁאִם יִזְכֶּה יַבְחִין מָה בֵּין מַלְכֵי יִשְׂרָאֵל וְגוֹ'. וְאַף בְּעָנְשָׁן שֶׁל דִּבְרֵי חֲכָמִים אֵין לָהֶם אֶלָּא נִדּוּי, כְּמוֹ שֶׁאָמְרוּ (פסחים נב, א) מְנַדִּין עַל שְׁנֵי יָמִים טוֹבִים שֶׁל גָּלִיּוֹת. וְאָמְרוּ בָּעֹשֶׂה מְלָאכָה בְּפוּרִים וְלִשַׁמְּתֵהּ מָר. וּבִמְקוֹמוֹת יֵשׁ לָהֶם מַכַּת מַרְדּוּת, וְהוּא לְמִי שֶׁעוֹבֵר עַל דִּבְרֵיהֶם שֶׁהֵן כְּעֵין תּוֹרָה, וְהֵן כָּל הַגְּזֵרוֹת שֶׁגָּזְרוּ בָּהֶם מִדִּבְרֵיהֶם, שֶׁמַּכִּין אוֹתוֹ עַד שֶׁיְּקַבֵּל אוֹתָהּ עָלָיו אוֹ עַד שֶׁתֵּצֵא נַפְשׁוֹ, כְּמוֹ שֶׁמְּפֹרָשׁ בַּתּוֹסֶפְתָּא דְּסַנְהֶדְרִין. כְּלָלוֹ שֶׁל דָּבָר שֶׁדִּבְרֵי סוֹפְרִים חֲלוּקִים הֵם בְּכָל דִּינֵיהֶם מִדִּבְרֵי תוֹרָה, לְהָקֵל בִּקְצָתָן וּלְהַחְמִיר בִּקְצָתָן. אֲבָל הַדָּבָר הַבָּרוּר הַמְּנֻקֶּה מִכָּל שִׁבּוּשׁ הוּא שֶׁאֵין הַלָּאו הַזֶּה דְּלֹא תָסוּר אֶלָּא בַּמֶּה שֶׁאָמְרוּ זִכְרוֹנָם לִבְרָכָה בְּפֵרוּשׁ הַתּוֹרָה, כְּגוֹן הַדְּבָרִים הַנִּדְרָשִׁים בִּגְזֵרָה שָׁוָה אוֹ בְּבִנְיַן אָב וּשְׁאָר שְׁלֹשׁ עֶשְׂרֵה מִדּוֹת שֶׁהַתּוֹרָה נִדְרֶשֶׁת בָּהֶם אוֹ בְּמַשְׁמָעוּת לְשׁוֹן הַכָּתוּב עַצְמוֹ, וְכֵן בַּמֶּה שֶׁקִּבְּלוּ הֲלָכָה לְמֹשֶׁה מִסִּינַי, וְעַל זֶה יֹאמְרוּ זִכְרוֹנָם לִבְרָכָה שֶׁיֵּשׁ עֲשֵׂה וְלֹא תַעֲשֶׂה בַּדָּבָר, וְאִם בָּעִנְיָן הַזֶּה נֶחְלַק אֶחָד הָרָאוּי לְהוֹרָאָה בַּמֶּה שֶׁיֵּשׁ עַל זְדוֹנוֹ כָּרֵת וּבְשִׁגְגָתוֹ חַטָּאת עַל בֵּית דִּין הַגָּדוֹל שֶׁנַּעֲשָׂה בָּהֶם זָקֵן מַמְרֵא בִּזְמַן שֶׁנָּדִין בְּדִינֵי נְפָשׁוֹת, וְזֶהוּ אָמְרָם זִכְרוֹנָם לִבְרָכָה (ספרי כאן) אֲפִלּוּ יֹאמְרוּ לְךָ עַל שְׂמֹאל שֶׁהִיא יָמִין, כְּלוֹמַר, שֶׁכָּךְ הִיא הַמִּצְוָה לָנוּ מֵאֲדוֹן הַתּוֹרָה יִתְבָּרַךְ שֶׁנַּאֲמִין אֶל הַגְּדוֹלִים בַּמֶּה שֶׁיֹּאמְרוּ, וְלֹא יֹאמַר בַּעַל הַמַּחְלֹקֶת הֵיאַךְ אַתִּיר לְעַצְמִי, וַאֲנִי יוֹדֵעַ בְּוַדַּאי שֶׁהֵם הַטּוֹעִים? שֶׁאֲפִלּוּ יִהְיֶה כֵּן הוּא מְצֻוֶּה לְהַאֲמִין לָהֶם, וּכְמוֹ שֶׁכָּתַבְתִּי לְמַעְלָה בְּרֹאשׁ הַמִּצְוָה, וּכְעִנְיָן שֶׁנָּהַג רַבָּן גַּמְלִיאֵל עִם רַבִּי יְהוֹשֻׁעַ בְּיוֹם הַכִּפּוּרִים שֶׁחָל לִהְיוֹת בְּחֶשְׁבּוֹנוֹ, כְּמוֹ שֶׁמֻּזְכָּר בְּמַסֶּכֶת רֹאשׁ הַשָּׁנָה (כה א).
And Rambam, may his memory be blessed, wrote about the matter of this negative commandment of “you shall not stray” (Mishneh Torah, Laws of Rebels 1:2) that it is one whether they are things that the Sages learned from the received tradition, or things they learned from their intellects through one of the methods through which the Torah is expounded or things done to make a fence for the Torah — and they are the decrees, the ordinances and the practices (see Rashi on Yoma 74a, s.v. ve’aliba) — in each one of these three things, it is a positive commandment to listen to them; and the one who transgresses any one of them transgresses a positive commandment and a negative commandment. And Ramban, may his memory be blessed, greatly took a hold upon him [about this] and said (in the Sefer HaMitzvot in his gloss on Shoresh 1): Behold, the rabbi holds that included in the negative commandment of “you shall not stray” is everything that is from the words of the Rabbis — whether it is a rabbinic commandment such as the reading of the Scroll [of Esther] or the Channukah light, or whether it is from the ordinances such as poultry meat with milk and the secondary sexual prohibitions; whether they are active positive, such as three prayers every day or a hundred blessings and lulav on [all] seven [days] in the borders (outside of the Temple); or they are negative, such as anything that is because of a rabbinic Shabbat prohibition on Shabbat and holidays, and so [too,] the second day of a holiday in the Diaspora and the [fast of the] Ninth of Av; and more generally, anything that the Talmud forbids or commands about. And behold, the rabbi builds a fortified wall around the words of the Sages, but it is “like a spreading breach that occurs in a lofty wall, whose breaking comes sudden and swift”; as it is a rationale [that is found] wanting in many places in the Talmud. As behold, according to his opinion, one who uses what is connected to the ground on Shabbat, such as one who leans on a tree, or one who moves something from the sun to the shade or says to a gentile [to do work] and he does it or even if he takes a large step on Shabbat, he transgresses [both] a positive commandment and a negative commandment from the Torah, and he is fit to be lashed forty [lashes]. But the rabbi exempts him in the Book of Judges (Mishneh Torah, The Sanhedrin and the Penalties within Their Jurisdiction 18:2), because it is given to the warning of a death penalty by the court — as the death penalty of anyone who rebels against their words is with strangulation. And behold, according to his words, he should be lashed according to the opinion in the Talmud that says that we administer lashes for a negative commandment that is subject to the warning of a death penalty by the court — as is mentioned in the chapter [entitled] Mi Shehichshikh (Shabbat 154b). And according to that opinion, it is fitting to be very stringent in rabbinic laws, as they are all [from the] Torah. There is no difference at all between them and between the commandments explicit in the Scripture; and there [would] be nothing in the Torah more weighty than a rabbinic Shabbat prohibition which is of their words, except that which has a liability of excision or the death penalty by the court — but not anything that has the obligation of a positive commandment or a negative commandment. As behold, according to his opinion, there is the obligation of a positive commandment and a negative commandment in all of their words — the positive commandment of “And you shall act according to the thing that they tell you,” and the negative commandment of “you shall not stray.” And behold it is seen that our Rabbis in all of the Gemara say the opposite of this. As behold, they determine all rabbinic cases leniently, as they always say (Beitzah 3b), “A doubt of Torah [law] is to be [ruled] stringent and a doubt of rabbinic [law] is to be [ruled] lenient. And they were lenient regarding a concern of rabbinically forbidden [products being present in a certain food], to say, “As I say” (that we can assume that it is not present). And they said in the first chapter of Pesachim 9b, “I will say that we say, ‘As I say,’ in a rabbinic [law]; in a Torah [law], can we say, ‘As I say?’” And they relied upon minors who are not fit to testify, to testify on that which is rabbinic, as they said (Pesachim 4b), “The checking for chamets is rabbinic, and the Rabbis relied upon them in rabbinic [laws].” And so [too,] regarding perimeters, a minor is believed to say, “The perimeter of Shabbat is to here,” [as they] “held that perimeters are rabbinic, and the Rabbis were lenient in the rabbinic,” as it is found in Eruvin 58b and in Ketuvot 28b. And they were also likewise lenient in the rabbinic with doubts, as they, may their memory be blessed, said (Berakhot 21a), “[If] there is a doubt if he prayed or if he did not pray, he does not go back and pray; [if] there is a doubt if he said, ‘True and solid’ or he did not say it, he goes back” — and they said, “What is the reason? Prayer is rabbinic; ‘True and solid’ is from the Torah.” And not only that, but they were even lenient about things that contradict each other in rabbinic [law] — as they said in the chapter [entitled] Bameh Madlikin (Shabbat 34a), “[If] two [people] said to him, ‘Go out and make an eruv for us’; he made an eruv for one while it was still day, etc.,” as it appears there. And it is also seen in the Gemara that we constantly uproot their words on account of a Torah prohibition; as they said in Tractate Shabbat 4a, “If he stuck bread onto an oven [wall], they permitted him to scrape it off before he comes to a prohibition [that is punished with] stoning.” And there in Shabbat 128b they said, “Negating a vessel from its preparedness is rabbinic, but [causing] the pain of animals is [from] the Torah, and a positive commandment [from] the Torah comes and negates a positive commandment [from] the Rabbis,” as it appears there. And this is [something seen] very much in the Talmud — a positive commandment [from] the Torah comes and pushes off a positive commandment [from] the Rabbis. And so [too] with a disagreement among the Sages, they said (Avodah Zarah 7a), “If one [group] was greater in wisdom, follow it; and if not, follow the stringent [one] in that of the Torah, and the lenient in that of the [Rabbis].” And even greater than this, they said (Eruvin 67b), “In that of the [Rabbis,] we first do the act, and then we deliberate.” And in the chapter [entitled], Mi Shehichshikh (Shabbat 154b), they said, “What is it that you would say? They were also concerned with a small loss. Hence, it makes us hear” — as it is a novelty with them when they do not push off the words of the [Rabbis], even for a small loss. And they said (Berakhot 19b) that priests can render themselves impure with rabbinic impurity to see kings of the nations of the world; so that if they merit [it], they will differentiate that [which separates] the kings of Israel, etc. And also regarding the punishments of the words of the [Rabbis], they only have excommunication, as they said (Pesachim 52), “We excommunicate for the two days of holiday in the Diaspora.” And they said about one who does work on Purim, “Let the master excommunicate him.” And in [some] places, they have lashes of rebellion, and that is for one that transgress their words that are similar to [commandments] of the Torah — and those are all the decrees that they decreed from their [own] words — that they lash him until he accepts it upon him or until his soul departs, as is explained in the Tosefta of Sanhedrin. The general rule of the matter is that the words of the [Rabbis] are different in all of their laws from the words of the Torah, that [the one tends] towards leniency, and [the other] towards stringency. But the thing that is clear and clean of any confusion is that this negative commandment of “you shall not stray” is only in that which they, may their memory be blessed, said in explanation of the Torah — such as things that are expounded through a gezerah shava or a binyan av or the rest of the thirteen methods through which the Torah is expounded; or about the meaning of the language of the verse itself — and so [too] regarding that which they received as a law of Moshe from Sinai. And it is about this that they, may their memory be blessed, said that there is a positive commandment and a negative commandment in the thing. And if in this matter, one fitting to pronounce decisions disagrees with the Great Court about that which the volitional transgression [brings] excision and the inadvertent violation [brings] a sin-offering, he becomes a rebellious elder through them — at a time when we judge capital cases. And this is [the meaning of] that which they, may their memory be blessed, said (Sifrei Devarim 154), “Even if they tell you about the left that it is right”; meaning to say that this is the commandment upon us from the Master of the Torah, may He be blessed — that we believe the greats regarding what they say, and that the one who disagrees not say, “How can I permit it for myself, since I know with certainty that they are mistaken?” As even if it will be such, it is a commandment to listen to them — as I wrote above at the beginning of the commandment — and like the matter that Rabban Gamliel conducted with Rabbi Yehoshua on Yom Kippur that fell out according to [the latter’s] calculation, as is mentioned in Rosh Hashanah 25a.