Reference for Sheviit 4:9
זֵיתִים, מִשֶּׁיַּכְנִיסוּ רְבִיעִית לִסְאָה, פּוֹצֵעַ וְאוֹכֵל בַּשָּׂדֶה. הִכְנִיסוּ חֲצִי לֹג, כּוֹתֵשׁ וְסָךְ בַּשָּׂדֶה. הִכְנִיסוּ שְׁלִישׁ, כּוֹתֵשׁ בַּשָּׂדֶה וְכוֹנֵס לְתוֹךְ בֵּיתוֹ. וְכֵן כַּיּוֹצֵא בָהֶם בִּשְׁאָר שְׁנֵי שָׁבוּעַ, חַיָּבִים בְּמַעַשְׂרוֹת. וּשְׁאָר כָּל פֵּרוֹת הָאִילָן, כְּעוֹנָתָן לַמַּעַשְׂרוֹת, כֵּן עוֹנָתָן לַשְּׁבִיעִית:
Olives, once a <i>Se'ah</i> [of olives, specific unit of volume] can produce a <i>Revi'it</i> [of oil, specific unit of volume, quarter of a <i>Log</i>], he may crack them and eat them in the field. When they can produce a half <i>Log</i> [specific unit of volume], he may crush [them] and rub on [the oil] in the field. When they can produce a third, he may crush [them] in the field and gather [them] into his house. And those similar to them [in stage of ripeness] during the other years [of the seven-year cycle] require tithes. And all the other fruit of the tree, just like their season for [requiring] tithes, so is their season for [consumption during] the Sabbatical year.