Negative commandment · Lo Ta’aseh #268 of 613
For a worker not to take more than what he eats [from the produce he harvests]
שלא ייקח השכיר יתר על אכילתו
The verse · Devarim 23:25
כִּי תָבֹא בְּכֶרֶם רֵעֶךָ וְאָכַלְתָּ עֲנָבִים כְּנַפְשְׁךָ שׇׂבְעֶךָ וְאֶל־כֶּלְיְךָ לֹא תִתֵּן
“When thou comest into thy neighbour’s vineyard, then thou mayst eat thy fill of grapes at thy desire; but thou shalt not put any in thy vessel.”
The Rambam’s words
For a worker not to take more than what he eats [from the produce he harvests], as [Deuteronomy 23:25] states: "Do not put any into your receptacles."
שלא ייקח השכיר יתר על אכילתו, שנאמר "וְאָכַלְתָּ עֲנָבִים כְּנַפְשְׁךָ שָׂבְעֶךָ" (דברים כג, כה).
Where in the Mishneh Torah
Hilchot Hiring הלכות שכירות