יורה דעה רצ״אYoreh De'ah 291

Se’if 1א׳

מְזוּזַת יָחִיד נִבְדֶּקֶת פַּעֲמַיִם בְּשֶׁבַע שָׁנִים. וְשֶׁל רַבִּים, פַּעֲמַיִם בְּיוֹבֵל.

Mezuzah -- when to check it and who requires one? An individual’s mezuzah is [required to be] checked twice [every] seven years. But a public/community mezuzah is [only required to be] checked twice [every] fifty years.

Se’if 2ב׳

הַשּׂוֹכֵר בַּיִת מֵחֲבֵרוֹ, הַשּׂוֹכֵר חַיָּב לִקְבֹּעַ בָּהּ מְזוּזָה וּלְתַקֵּן מְקוֹם קְבִיעוּתָהּ. וַאֲפִלּוּ שָׂכַר הַבַּיִת בְּחֶזְקָת שֶׁיֵּשׁ לָהּ מְזוּזָה, לֹא הָוֵי מִקָּח טָעוּת (בֵּית יוֹסֵף בְּשֵׁם הָרַב רַבֵּנוּ הַמָּנוֹחַ). וּכְשֶׁיֵּצֵא, לֹא יִטְּלֶנָּה בְּיָדוֹ. וְאִם הִקְפִּיד עַל מְעוֹתֶיהָ, הַשֵּׁנִי צָרִיךְ לְשַׁלֵּם לוֹ (בֵּית יוֹסֵף בְּשֵׁם הָרַב מָנוֹחַ). וְאִם שָׂכַר הַבַּיִת מֵעוֹבֵד כּוֹכָבִים, אוֹ שֶׁשְּׂכָרוֹ לְעוֹבֵד כּוֹכָבִים, נוֹטְלָהּ וְיוֹצֵא. הַגָּה: וְעוֹבֵד כּוֹכָבִים שֶׁבִּקֵּשׁ שֶׁיִּתְּנוּ לוֹ מְזוּזָה, וְרוֹצֶה לְקָבְעָהּ בְּפִתְחוֹ, אָסוּר לִתְּנָהּ לוֹ (כָּךְ הֵשִׁיב מהרי"ל). וְנִרְאֶה לִי דְּמִכָּל מָקוֹם בְּמָקוֹם דְּאִכָּא לְמֵיחַשׁ מִשּׁוּם אֵיבָה, וְשֶׁיֵּרַע מִשּׁוּם זֶה לְיִשְׂרָאֵל, שָׁרֵי כַּךְ נִרְאֶה לִי.

[If] one rents a house from one’s friend, the renter/lessee must affix a mezuzah [to the house] and repair the place where it is affixed. (And even if the person rented the house under the [mistaken] assumption that it [already] had a mezuzah, it is not an invalid lease.) And when the renter/lessee leaves [when the lease expires], she/he does not take [the mezuzah] in her/his hand [i.e., the lessee leaves behind the mezuzah]. (And if the lessee is stingy with regard to her/his finances, the second person [i.e., the lessor] is required to reimburse him/her [for the value of the mezuzah].) And if one rented the house from an idolater, or rented the house to an idolater, one takes [the mezuzah] and leaves [with it when the lease expires]. Rama: And an idolater who asks that one give her/him a mezuzah [because he/she] wants to affix it to his/her doorway, it is forbidden to give a mezuzah to the idolater. But it seems to me that in a case where there is reason to be concerned that in that particular place there will be hostility [towards Jews if one does not give the mezuzah to the idol worshiper], and that the idol worshiper will treat Jews poorly because of this, it is permissible [to give a mezuzah to an idol worshipper].

Se’if 3ג׳

הַכֹּל חַיָּבִים בִּמְזוּזָה, אֲפִלּוּ נָשִׁים וַעֲבָדִים, וּמְחַנְּכִים אֶת הַקְּטַנִּים לַעֲשׂוֹת מְזוּזָה לְפִתְחֵיהֶם.

All are obligated in [the performance of the mitzvah of] mezuzah, even women and slaves. And we teach children to perform [the mitzvah of] mezuzah for their doorways.