Reference for Bava Batra 2:1
לֹא יַחְפֹּר אָדָם בּוֹר סָמוּךְ לְבוֹרוֹ שֶׁל חֲבֵרוֹ, וְלֹא שִׁיחַ, וְלֹא מְעָרָה, וְלֹא אַמַּת הַמַּיִם, וְלֹא נִבְרֶכֶת כּוֹבְסִין, אֶלָּא אִם כֵּן הִרְחִיק מִכֹּתֶל חֲבֵרוֹ שְׁלשָׁה טְפָחִים, וְסָד בְּסִיד. מַרְחִיקִין אֶת הַגֶּפֶת וְאֶת הַזֶּבֶל וְאֶת הַמֶּלַח וְאֶת הַסִּיד וְאֶת הַסְּלָעִים מִכָּתְלוֹ שֶׁל חֲבֵרוֹ שְׁלשָׁה טְפָחִים, וְסָד בְּסִיד. מַרְחִיקִין אֶת הַזְּרָעִים, וְאֶת הַמַּחֲרֵשָׁה, וְאֶת מֵי רַגְלַיִם מִן הַכֹּתֶל שְׁלשָׁה טְפָחִים. וּמַרְחִיקִין אֶת הָרֵחַיִם שְׁלשָׁה מִן הַשֶּׁכֶב, שֶׁהֵן אַרְבָּעָה מִן הָרָכֶב. וְאֶת הַתַּנוּר, שְׁלשָׁה מִן הַכִּלְיָא, שֶׁהֵן אַרְבָּעָה מִן הַשָּׂפָה:
One may not dig a bor [(round)] near his neighbor's bor, nor a shiach [(long and narrow)], nor a ma'arah [(roofed)], nor a water canal, nor a wash-pond [a square pit in which rain water is collected for washing clothes], unless he distances it three handbreadths from his neighbor's wall [i.e., from the wall of his hole. And the thickness of the wall of a hole is not less than three handbreadths, so that the distance from his hole to that of his neighbor is found to be six handbreadths. And one may not place one of the "damagers" alongside his neighbor's boundary unless he removes it the required distance, even if there is no wall there, lest his neighbor decide to build there and he cause damage to him.] And he coats [the walls of his hole] with lime. One distances olive-peel peat, and manure, and salt, and lime, and flint three handbreadths from his neighbor's wall. [For all of these "undermine" a wall. (The "wall" here is not that of a hole.)] One distances sowing, plowing, and urine three handbreadths from a wall. [("plowing":) Plowing even without sowing (as when one plows for trees) undermines a wall. ("urine"): It erodes bricks, which are of dried clay. Therefore, if one urinates near a brick wall, he must move back three handbreadths. With a stone wall, one handbreadth suffices; and with hard stone, such as granite, he need not move back at all.] And a mill must be removed (from a wall). [(Its "rattling" undermines the wall's foundation)] three (handbreadths) from the shechev (the lower part), which are four from the rechev (the upper part). [The rechev "rides" on the shechev, and is a handbreadth narrower.] And an oven (must be removed) three from the kilya which are four from the surface. [The kilya is the base, built of clay and stones, on which the oven is placed. It is broad below and narrow above. The upper surface of the kilya, on which the oven is set, is of the same width as the oven. This base must be removed three handbreadths from the wall, four handbreadths from its upper surface, for the heat of the stove damages the wall.]