ג סֻכָּה גְּזוּלָה, כְּשֵׁרָה. כֵּיצַד, אִם תָּקַף עַל חֲבֵרוֹ וְהוֹצִיאוֹ מִסֻכָּתוֹ וּגְזָלָהּ וְיָשַׁב בָּהּ, יָצָא, שֶׁאֵין הַקַּרְקַע נִגְזֶלֶת. הַגָּה: מִיהוּ לְכַתְּחִלָּה לֹא יֵשֵׁב אָדָם בְּסֻכַּת חֲבֵרוֹ שֶׁלֹּא מִדַּעְתּוֹ, כָּל שֶׁכֵּן אִם דַּעְתּוֹ לְגָזְלָהּ, וְכֵן לֹא יַעֲשֶׂה (סֻכָּה) לְכַתְּחִלָּה בְּקַרְקַע שֶׁל חֲבֵרוֹ שֶׁלֹּא מִדַּעְתּוֹ, וְכֵן בְּקַרְקַע שֶׁהִיא שֶׁל רַבִּים (הַגָּהוֹת אֲשֵׁרִי וְאוֹר זָרוּעַ); מִיהוּ בְּדִיעֲבַד יָצָא. וְכֵן לֹא יִקְצְצוּ יִשְׂרָאֵל הַסְּכָךְ בְּעַצְמָם, אֶלָּא יִקְנוּ אוֹתָם מֵעוֹבְדֵי כּוֹכָבִים, דְּכָל גֶּזֶל אֵין עוֹשִׂין מִמֶּנּוּ סֻכָּה לְכַתְּחִלָּה (מַהֲרִי"ל); וְאִם גָּזַל עֵצִים וְעָשָׂה מֵהֶם סֻכָּה, אַף עַל פִּי שֶׁלֹּא חִבְּרָן וְלֹא שִׁנָּה בָּהֶם כְּלוּם, יָצָא; תַּקָּנַת חֲכָמִים, שֶׁאֵין לְבַעַל הָעֵצִים אֶלָּא דְּמֵי עֵצִים בִּלְבַד; אֲבָל אִם גָּזַל סֻכָּה הָעֲשׂוּיָה בְּרֹאשׁ הַסְפִינָה אוֹ בְּרֹאשׁ הָעֲגָלָה, וְיָשַׁב בָּהּ, לֹא יָצָא. הַגָּה: וְהוּא הַדִּין אִם רְאוּבֵן בָּנָה סֻכָּה בְּקַרְקַע שִׁמְעוֹן, וְשִׁמְעוֹן תָּקַף אֶת רְאוּבֵן וְגָזַל סֻכָּתוֹ הַבְּנוּיָה בַּקַּרְקַע שֶׁלּוֹ, לֹא יָצָא בָּהּ וְאֵין כָּאן תַּקָּנַת הַשָּׁבִים, הוֹאִיל וְלֹא טָרַח בָּהּ וְלֹא הוֹצִיא עָלֶיהָ הוֹצָאוֹת (הַגָּהוֹת אֲשֵׁרִ"י פ"ב דְּסֻכָּה).
3 A stolen sukkah is valid. How? If one overpowered his friend, left his (own) sukkah and stole it and then dwelt in it, he has fulfilled his obligation, since land can never be stolen. Rema: However, initially, one should not sit in his friend's sukkah without his permission; all the more if he sat in it without his permission with the intent of stealing it. Therefore, we do not initially make a sukkah on someone else's property without their permission, and likewise for public property (Hagahos Ashiri). However, after the fact, he has fulfilled his obligation. Therefore, a Jew does not cut his own s'chach; rather he buys it from a gentile, and one does not initially make a sukkah out of anything that is stolen (Maharil). If one stole pieces of wood and made a sukkah with them (and used them as s’chach for his sukkah, the sukkah may be valid) even though he did not attach them to his sukkah but merely placed them on it and didn't change them at all, he has fulfilled his obligation. The Sages ordained that the person from whom the wood was stolen is owed only its value. However, if someone stole a sukkah that was built on top of a ship or on top of a wagon and dwells in it, he has not fulfilled his obligation. Rema: And this is the law if Reuven built a sukkah on Shimon's land, and Shimon overpowered Reuven and stole the sukkah that was built on his property, Shimon has not fulfilled his obligation with it. The Sages instituted such an ordinance only when one labored (to build a sukkah) for the sake of the mitzvah, and when one invested effort (Hagahos Ashiri