כִּ֤י תָבֹא֙ בְּכֶ֣רֶם רֵעֶ֔ךָ וְאָכַלְתָּ֧ עֲנָבִ֛ים כְּנַפְשְׁךָ֖ שָׂבְעֶ֑ךָ וְאֶֽל־כֶּלְיְךָ֖ לֹ֥א תִתֵּֽן׃ (ס)
Quand tu entreras dans la vigne de ton prochain, tu pourras manger des raisins à ton appétit, jusqu’à t’en rassasier; mais tu n’en mettras point dans ton panier.
Rashi
כי תבא בכרם רעך WHEN THOU COMEST INTO THE VINEYARD OF THY FELLOW MAN, [THEN THOU MAYEST EAT GRAPES AT THY FILL] — Scripture is speaking of a laborer (who is engaged in gathering in the grapes, but not of one who is doing other work in the vineyard, nor of one who enters the vineyard with no intention to do work; cf. Rashi in the next passage) (Bava Metzia 87b).
Chizkuni
כי תבא בכרם רעך, “when you came into your neighbour’s vineyard, etc.” The reason why this subject is discussed here is to contrast it with your having vowed something. When you make a vow it can only be concerning something that you own; when you enter your neighbour’s private property anything you remove comes under the heading of “taking.” (Ibn Ezra) [Ibn Ezra assumes that you have business in your neighbour’s vineyard, seeing you have been hired to help harvest the grapes. Ed.]
Ibn Ezra
When you come into your fellowman’s vineyard in order to harvest the grapes, you may eat them. This passage is connected to the previous one, because you are required to fulfill your vows from your own possessions, and not take others’ property for your own use.