Reference for Maasrot 3:2

הַמּוֹצִיא פּוֹעֲלָיו לַשָּׂדֶה, בִּזְמַן שֶׁאֵין לָהֶם עָלָיו מְזוֹנוֹת, אוֹכְלִין וּפְטוּרִין. וְאִם יֶשׁ לָהֶם עָלָיו מְזוֹנוֹת, אוֹכְלִין אַחַת אַחַת מִן הַתְּאֵנָה, אֲבָל לֹא מִן הַסַּל וְלֹא מִן הַקֻּפָּה וְלֹא מִן הַמֻּקְצֶה:

One who brought his workers out to the field, when they are not owed food by him, they may eat and are exempt. But if they are owed food by him, they may eat of the figs one at a time, but not from the basket, nor from the large basket, nor from the place where they dry.

Jastrow