See Deuteronomy 24:19-21. “Grape” signifies fallen fruit of any kind; and “vineyard” a fruit garden of any kind. Compare Deuteronomy 23:24.

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And you shall not glean your vineyard. —When harvesting the vine, care should be taken only to cut off the large clusters…

And you shall not glean your vineyard
Or cut off the little clusters which are, as Aben Ezra observes, like an infant…

There are some ceremonial precepts in this chapter, but most of these precepts are binding on us, for they are explanations of the Ten Commandments…