בבא בתרא ג׳Bava Batra 3

Mishnah 1א׳

חֶזְקַת הַבָּתִּים וְהַבּוֹרוֹת וְהַשִּׁיחִין וְהַמְּעָרוֹת וְהַשּׁוֹבָכוֹת וְהַמֶּרְחֲצָאוֹת וּבֵית הַבַּדִּין וּבֵית הַשְּׁלָחִין וְהָעֲבָדִים וְכָל שֶׁהוּא עוֹשֶׂה פֵרוֹת תָּדִיר, חֶזְקָתָן שָׁלֹשׁ שָׁנִים מִיּוֹם לְיוֹם. שְׂדֵה הַבַּעַל, חֶזְקָתָהּ שָׁלֹשׁ שָׁנִים, וְאֵינָהּ מִיּוֹם לְיוֹם, רַבִּי יִשְׁמָעֵאל אוֹמֵר, שְׁלֹשָׁה חֳדָשִׁים בָּרִאשׁוֹנָה וּשְׁלֹשָׁה בָּאַחֲרוֹנָה וּשְׁנֵים עָשָׂר חֹדֶשׁ בָאֶמְצַע, הֲרֵי שְׁמֹנָה עָשָׂר חֹדֶשׁ. רַבִּי עֲקִיבָא אוֹמֵר, חֹדֶשׁ בָּרִאשׁוֹנָה וְחֹדֶשׁ בָּאַחֲרוֹנָה וּשְׁנֵים עָשָׂר חֹדֶשׁ בָּאֶמְצַע, הֲרֵי אַרְבָּעָה עָשָׂר חֹדֶשׁ. אָמַר רַבִּי יִשְׁמָעֵאל, בַּמֶּה דְבָרִים אֲמוּרִים, בִּשְׂדֵה לָבָן. אֲבָל בִּשְׂדֵה אִילָן, כָּנַס אֶת תְּבוּאָתוֹ, מָסַק אֶת זֵיתָיו, כָּנַס אֶת קֵיצוֹ, הֲרֵי אֵלּוּ שָׁלֹשׁ שָׁנִים:

The legal period of chazakah [a presumption of ownership, generally regarding landed property, established by unchallenged, publicly known possession for a certain period of time, together with a legally acceptable claim regarding how the property came into the possessor’s hands] for houses, cisterns, trenches, caves, dovecotes, bath-houses, olive-presses, irrigated fields and slaves and anything which continually produces a yield is three complete years . The legal period of possession [in order to establish ownership] for a field irrigated by rain water is three years and they need not be completed. Rabbi Yishmael says: Three months during the first year, and three months during the last year and twelve months during the middle year, which makes eighteen months. Rabbi Akiva says: One month during the first year and one month during the last year and twelve months during the middle year, which makes fourteen months. Rabbi Yishmael said: When does this apply? With regards to a grain field, but when it comes to a field of trees , if he brought in his produce (grapes), harvested the olives and gathered in his fig harvest, this counts as three years.

Mishnah 2ב׳

שָׁלֹשׁ אֲרָצוֹת לַחֲזָקָה, יְהוּדָה וְעֵבֶר הַיַּרְדֵּן וְהַגָּלִיל. הָיָה בִיהוּדָה וְהֶחֱזִיק בַּגָּלִיל, בַּגָּלִיל וְהֶחֱזִיק בִּיהוּדָה, אֵינָהּ חֲזָקָה, עַד שֶׁיְּהֵא עִמּוֹ בַמְּדִינָה. אָמַר רַבִּי יְהוּדָה, לֹא אָמְרוּ שָׁלֹשׁ שָׁנִים אֶלָּא כְדֵי שֶׁיְּהֵא בְאַסְפַּמְיָא, וְיַחֲזִיק שָׁנָה, וְיֵלְכוּ וְיוֹדִיעוּהוּ שָׁנָה, וְיָבֹא לְשָׁנָה אַחֶרֶת:

There are three separate areas of land for the purposes of chazakah; [obtaining land through demonstrating ownership for an extended period of time]: Judea, The Eastern Side of the Jordan and the Galilee. If the owner of a piece of land in the Galilee was currently living in Judea and someone occupied on that person's land in the Galilee, that person would not acquire said land and vice versa. One can only acquire the land if they are living in the same region. Rabbi Yehuda says, the reason it takes three years to acquire land through occupying it is so that if the owner were in Spain the squatter could squat for one year, people traveling to inform the owner would take one year and then one year to return with the owner's objection.