11הַחֵרֵשׁ כְּשׁוֹטֶה שֶׁאֵין דַּעְתּוֹ נְכוֹנָה וְאֵינוֹ בֶּן מִצְוֹת. וְאֶחָד חֵרֵשׁ מְדַבֵּר וְאֵינוֹ שׁוֹמֵעַ אוֹ שׁוֹמֵעַ וְאֵינוֹ מְדַבֵּר. אַף עַל פִּי שֶׁרְאִיָּתוֹ רְאִיָּה מְעֻלָּה וְדַעְתּוֹ נְכוֹנָה צָרִיךְ לְהָעִיד בְּבֵית דִּין בְּפִיו. אוֹ שֶׁיִּהְיֶה רָאוּי לְהָעִיד בְּפִיו. וְיִהְיֶה רָאוּי לִשְׁמֹעַ הַדַּיָּנִים וְהָאִיּוּם שֶׁמְּאַיְּמִין עָלָיו. וְכֵן אִם נִשְׁתַּתֵּק אַף עַל פִּי שֶׁנִּבְדַּק בְּדֶרֶךְ שֶׁבּוֹדְקִין לְעִנְיַן גִּטִּין וְנִמְצֵאת עֵדוּתוֹ מְכֻוֶּנֶת וְהֵעִיד בְּפָנֵינוּ בִּכְתַב יָדוֹ אֵינָהּ עֵדוּת כְּלָל. חוּץ מֵעֵדוּת אִשָּׁה לְפִי שֶׁבְּעִגּוּנָהּ הֵקֵלּוּ:
A deaf-mute is equivalent to a mentally unstable person, for he is not of sound mind and is therefore not obligated in the observance of the mitzvot. Both a deaf person who can speak and a person who can hear, but is mute is unacceptable to serve as a witness. Even though he sees excellently and his mind is sound, he must deliver testimony orally in court or be fit to deliver testimony orally and must be fit to hear the judges and the warning they administer to him. Similarly, if a person loses the ability to speak, even though his intellectual faculties have been checked as a husband is checked with regard to a bill of divorce, he testifies in writing, and his testimony is to the point, it is not accepted at all, except with regard to releasing a women from marriage, for leniency was granted so that women will not be forced to live alone.