Halakhah zu Peah 6:14

From the laws of the commandment is that which they, may their memory be blessed, said (Mishnah Peah 6:5), "One or two sheaves are gleanings, three are not gleanings" - meaning to say, if three sheaves or more fall together from the hand of the harvester, the three of them [go] to the owner of the field; as the law of gleanings is only with a little, and specifically when the gleanings fell from the harvester without duress (Mishnah Peah 4:10). But if a thorn struck his hand and they fell, this is not gleanings. And [if there] is a doubt [whether they are] gleanings, they are [considered] gleanings; as it is stated (Psalms 82:3), "the poor and destitute shall you justify" - justify from what is yours and give [it] to him. And the law of produce that is found in ant holes (Mishnah Peah 4:10); the law of a sheave of gleanings that is mixed up in a pile (Mishnah Peah 4:2); and the rest of its details are elucidated in Tractate Peah. And with regards to in which place it is practiced and who is obligated about it and the punishment of one who transgresses it, it is all like the corner.

From the laws of the commandment is that which they, may their memory be blessed, said (Mishnah Peah 6:5), "Which is fallen grapes? That is one or two [grapes]" that separate from the cluster at the time of the grape harvest." But three [grapes]" that fell at one time "are not fallen grapes." If he was harvesting and he threw them to the ground, when he removes the clusters, even half of a cluster that is found [all separated] there is fallen grapes; and so [too,] a whole cluster that separated there, behold it is fallen grapes. And [regarding] the one who places his basket under the vine at the time of the grape harvest - behold, this one robs the poor (Mishnah Peah 7:5). [These] and the rest of its details are in Tractate Peah (see Tur, Yoreh Deah 332).

And from the laws of the commandment is that, which they, may their memory be blessed, said (Mishnah Peah 6:6 and see Mishneh Torah, Gifts to the Poor 5:18), "If a sheaf has [a volume of] two seah and he forgets it, it is not [considered] forgotten" - as it states, "and your forget a sheaf" - not a stack. And [also] that which they said (Mishnah Peah 5:7 and see Mishneh Torah, Gifts to the Poor 5:18), "A sheaf that is forgotten by workers and not forgotten by the property owner, or that is forgotten by the property owner and not forgotten by the workers," or that it is forgotten by both of them, but there were others there that did not forget it - it is not [considered] forgotten until it is forgotten by every person. And the rest of its details are elucidated in Tractate Peah (see Tur, Yoreh Deah 332).