Ma'asros2: 2
הָיוּ יוֹשְׁבִים בְּשַׁעַר אוֹ בְחָנוּת, וְאָמַר: ,,טְלוּ לָכֶם תְּאֵנִים”, אוֹכְלִין וּפְטוּרִין, וּבַעַל הַשַּׁעַר וּבַעַל הֶחָנוּת חַיָּבִין. רַבִּי יְהוּדָה פוֹטֵר עַד שֶׁיַּחֲזִיר אֶת פָּנָיו, אוֹ עַד שֶׁיְּשַׁנֶּה מְקוֹם יְשִׁיבָתוֹ.
[If a group of people] were sitting in a gateway or in a store, and [the owner of the courtyard or store] said, “Take figs for yourselves,” they may eat [the figs] and are exempt [from tithing them], but the owner of the gateway and the storeowner are obligated [to tithe the figs before eating them]. R' Yehudah exempts [the figs from tithes] unless [the owner] turns his face away, or unless he changes the place where he is sitting.