The Mishnah
בבא בתרא א׳Bava Batra 1
Perek 1 of 10 in Bava Batra — 6 mishnayot
Mishnah 1א׳
הַשֻּׁתָּפִין שֶׁרָצוּ לַעֲשׂוֹת מְחִצָּה בֶּחָצֵר, בּוֹנִין אֶת הַכֹּתֶל בָּאֶמְצַע. מְקוֹם שֶׁנָּהֲגוּ לִבְנוֹת גָּוִיל, גָּזִית, כְּפִיסִין, לְבֵנִים, בּוֹנִים, הַכֹּל כְּמִנְהַג הַמְּדִינָה. בְּגָוִיל, זֶה נוֹתֵן שְׁלֹשָׁה טְפָחִים, וְזֶה נוֹתֵן שְׁלֹשָׁה טְפָחִים. בְּגָזִית, זֶה נוֹתֵן טְפָחַיִם וּמֶחֱצָה, וְזֶה נוֹתֵן טְפָחַיִם וּמֶחֱצָה. בִּכְפִיסִין, זֶה נוֹתֵן טְפָחַיִם, וְזֶה נוֹתֵן טְפָחַיִם. בִּלְבֵנִים, זֶה נוֹתֵן טֶפַח וּמֶחֱצָה, וְזֶה נוֹתֵן טֶפַח וּמֶחֱצָה. לְפִיכָךְ אִם נָפַל הַכֹּתֶל, הַמָּקוֹם וְהָאֲבָנִים שֶׁל שְׁנֵיהֶם:
[If] joint owners agreed to make a division in a courtyard, they build the wall in the middle. They can build with rough stone, smooth stones, half-bricks, or bricks depending on the custom of the land. If [the division is made of] rough-stones, each person gives three hand- breadths. If [the division is made of] smooth stones, each person gives two and a half hands-breadths. If [the division is made of] half-bricks, each person gives two hands-breadths. If [the division is made of] full bricks, each person gives one and a half handbreadths. Therefore, if the wall falls, the place where the wall and the materials were will belong to both of them.
Mishnah 2ב׳
וְכֵן בְּגִנָּה, מְקוֹם שֶׁנָּהֲגוּ לִגְדֹּר מְחַיְּבִין אוֹתוֹ. אֲבָל בְּבִקְעָה, מְקוֹם שֶׁנָּהֲגוּ שֶׁלֹּא לִגְדֹּר אֵין מְחַיְּבִין אוֹתוֹ, אֶלָּא אִם רוֹצֶה כּוֹנֵס לְתוֹךְ שֶׁלּוֹ וּבוֹנֶה, וְעוֹשֶׂה חֲזִית מִבַּחוּץ. לְפִיכָךְ אִם נָפַל הַכֹּתֶל, הַמָּקוֹם וְהָאֲבָנִים שֶׁלּוֹ. אִם עָשׂוּ מִדַּעַת שְׁנֵיהֶן, בּוֹנִין אֶת הַכֹּתֶל בָּאֶמְצַע, וְעוֹשִׂין חָזִית מִכָּאן וּמִכָּאן. לְפִיכָךְ אִם נָפַל הַכֹּתֶל, הַמָּקוֹם וְהָאֲבָנִים שֶׁל שְׁנֵיהֶם:
Similarly in a garden; In a place where the custom is to build a fence, one can obligate him to build one. However, in a grain field, in a place where there isn't a custom to build a fence, one cannot obligate him. Rather, if one wants [to do so], one goes within one's own [property] and builds, and makes a sign facing outwards. Therefore, if the wall falls, the space [where the wall stood] and the bricks belong to that person. If the wall was created according to the will of both people, they build the wall in the middle, and create a sign on both sides. Therefore, if the wall falls, the space [where the wall stood] and the bricks belong to both people:
Mishnah, Torat Emet 357 edition, via Sefaria — public domain
English: Sefaria Community Translation — CC0