Reference for Sheviit 4:7

מֵאֵימָתַי אוֹכְלִין פֵּרוֹת הָאִילָן בַּשְּׁבִיעִית, הַפַּגִּים מִשֶּׁיַּזְרִיחוּ, אוֹכֵל בָּהֶם פִּתּוֹ בַּשָּׂדֶה. בִּחֲלוּ, כּוֹנֵס לְתוֹךְ בֵּיתוֹ. וְכֵן כַּיּוֹצֵא בָהֶם בִּשְׁאָר שְׁנֵי שָׁבוּעַ, חַיָּב בַּמַּעַשְׂרוֹת:

From when may one eat fruits during the Sabbatical year? Unripe figs, once they redden, one may eat one's bread with them in the field. Once they start to ripen, one may gather them into one's house. And those similar to them [in stage of ripeness] during the other years [of the seven-year cycle] require tithes.

Jastrow

Jastrow