12מִי שֶׁנִּדּוּהוּ בְּפָנָיו אֵין מַתִּירִין לוֹ אֶלָּא בְּפָנָיו. נִדּוּהוּ שֶׁלֹּא בְּפָנָיו מַתִּירִין לוֹ בְּפָנָיו וְשֶׁלֹּא בְּפָנָיו. וְאֵין בֵּין נִדּוּי לַהֲפָרָה כְּלוּם אֶלָּא מְנַדִּין וּמַתִּירִין בְּרֶגַע אֶחָד כְּשֶׁיַּחֲזֹר הַמְנֻדֶּה לַמּוּטָב. וְאִם רָאוּ בֵּית דִּין לְהַנִּיחַ זֶה בְּנִדּוּי כַּמָּה שָׁנִים מַנִּיחִין כְּפִי רִשְׁעוֹ. וְכֵן אִם רָאוּ בֵּית דִּין לְהַחֲרִים לָזֶה לְכַתְּחִלָּה וּלְהַחֲרִים מִי שֶׁיֹּאכַל עִמּוֹ וְשׁוֹתֶה עִמּוֹ אוֹ מִי שֶׁיַּעֲמֹד עִמּוֹ בְּאַרְבַּע אַמּוֹת מַחְרִימִין כְּדֵי לְיַסְּרוֹ וּכְדֵי לַעֲשׂוֹת סְיָג לַתּוֹרָה עַד שֶׁלֹּא יִפְרְצוּ הַחוֹטְאִים. אַף עַל פִּי שֶׁיֵּשׁ רְשׁוּת לֶחָכָם לְנַדּוֹת לִכְבוֹדוֹ אֵינוֹ שֶׁבַח לְתַלְמִיד חָכָם לְהַנְהִיג עַצְמוֹ בְּדָבָר זֶה אֶלָּא מַעֲלִים אָזְנָיו מִדִּבְרֵי עַם הָאָרֶץ וְלֹא יָשִׁית לִבּוֹ לָהֶן כָּעִנְיָן שֶׁאָמַר שְׁלֹמֹה בְּחָכְמָתוֹ (קהלת ז כא) "גַּם לְכָל הַדְּבָרִים אֲשֶׁר יְדַבְּרוּ אַל תִּתֵּן לִבְּךָ". וְכֵן הָיָה דֶּרֶךְ חֲסִידִים הָרִאשׁוֹנִים שׁוֹמְעִים חֶרְפָּתָם וְאֵינָן מְשִׁיבִין וְלֹא עוֹד אֶלָּא שֶׁמּוֹחֲלִים לַמְחָרֵף וְסוֹלְחִים לוֹ. וַחֲכָמִים גְּדוֹלִים הָיוּ מִשְׁתַּבְּחִים בְּמַעֲשֵׂיהֶם הַנָּאִים וְאוֹמְרִים שֶׁמֵּעוֹלָם לֹא נִדּוּ אָדָם וְלֹא הֶחְרִימוּהוּ לִכְבוֹדָן. וְזוֹ הִיא דַּרְכָּם שֶׁל תַּלְמִידֵי חֲכָמִים שֶׁרָאוּי לֵילֵךְ בָּהּ. בַּמֶּה דְּבָרִים אֲמוּרִים כְּשֶׁבִּזָּהוּ אוֹ חֵרְפָהוּ בַּסֵּתֶר. אֲבָל תַּלְמִיד חָכָם שֶׁבִּזָּהוּ אוֹ חֵרְפוֹ אָדָם בְּפַרְהֶסְיָא אָסוּר לוֹ לִמְחל עַל כְּבוֹדוֹ וְאִם מָחַל נֶעֱנָשׁ שֶׁזֶּה בִּזְיוֹן תּוֹרָה אֶלָּא נוֹקֵם וְנוֹטֵר הַדָּבָר כְּנָחָשׁ עַד שֶׁיְּבַקֵּשׁ מִמֶּנּוּ מְחִילָה וְיִסְלַח לוֹ:
Whenever a ban of ostracism is imposed in a person's presence, it should only be lifted in his presence. If it was issued outside his presence, it may be lifted in his presence or outside his presence. There is no [fixed amount of time] between the issuance of a ban and its release. Instead, one may issue a ban and lift it immediately if the person placed under ban improves his behavior. However, [if the court sees fit for this individual to remain under ban for a number of years, they may extend [the ban] according to his wickedness. Similarly, if it sees fit, the court is entitled to excommunicate a person at the outset or to excommunicate anyone who eats, drinks, or stands within four cubits of a person who has been ostracized. [This power is granted] to cause [the banned person] hardship and [thus,] create a fence around the Torah, so that it will not be violated by the sinners. Even though a Torah sage may place a person under a ban of ostracism [to preserve] his honor, it is not praiseworthy for a sage to accustom himself to this practice. Instead, he should turn his ears from the words of the common people and not pay attention to them, as Solomon said in his wisdom [Ecclesiastes 7:21]: “Also, do not pay heed to all the words that are spoken.” This was the practice of the pious of the early generations. They would hear their shame and not answer. Furthermore, they would pardon and forgive the person who insulted them. The great sages would take pride in their pleasant deeds, relating that they never issued a ban of ostracism or excommunication [to protect] their honor. This is the path of the sages which is worthy of being followed. When does the above apply? When [the person] spurned or embarrassed [the sage] in private. However, if one spurns or embarrasses a sage in public, it is forbidden for the sage to forgo his honor. Indeed, if he does so, he is punished, because the disrespect of the Torah is involved. Instead, he should seek vengeance and carry enmity over the matter like a snake until the offender requests to be pardoned. Then, he should forgive him.