Jerusalem Talmud Bava Kamma 5.3

משנה: הִכְנִיס פֵּירוֹתָיו לַחֲצַר בַּעַל הַבַּיִת שֶׁלֹּא בִּרְשׁוּת וַאֲכָלָתָן בֶּהֶמְתּוֹ שֶׁל בַּעַל הַבַּיִת פָּטוּר וְאִם הוּזְּקָה בָהֶן בַּעַל הַפֵּירוֹת חַיָיב וְאִם הַכְנִיס בִּרְשׁוּת בַּעַל הֶחָצֵר חַיָיב.

MISHNAH: If somebody put his produce in a private courtyard without permission and an animal of the owner ate them, [the owner] is not liable; if [the animal] was hurt, the owner of the produce is liable. But if he puts them there with permission, the owner of the courtyard is liable.

הלכה: הִכְנִיס פֵּירוֹתָיו לַחֲצַר בַּעַל הַבַּיִת כול׳. הִכְנִיס פֵּירוֹתָיו לַחֲצַר בַּעַל הַבַּיִת שֶׁלֹּא בִּרְשׁוּת וּבָא שׁוֹר מִמָּקוֹם אַחֵר וַאֲכָלָן פָּטוּר. הוּזַּק בָּהֶן פָּטוּר. הָדָא אָמְרָה. שֶׁהַשֵּׁן פְּטוּרָה בֶחָצֵר שֶׁאֵינָהּ לִשְׁנֵיהֶן.

HALAKHAH: “If somebody put his produce in a private courtyard,” etc. If he put his produce in a private courtyard without permission and a bull came from another place and ate them, he is not liable. If it was hurt by them, he is not liable. This implies that the ‘tooth’ is not liable in a courtyard which belongs to neither party.