Mishnà su Deuteronomio 24:21

A vineyard which consists entirely of defective clusters: Rabbi Eliezer says: it belongs to the owner. Rabbi Akiva says: to the poor. Rabbi Eliezer: “When you harvest the grapes of your vineyard, do not take the defective clusters” (Deuteronomy 24:21). If there is no grape harvesting, how can there be “defective clusters”? Rabbi Akiva said to him: “And from your vineyard do not take the defective clusters” (Leviticus 19:10) even if it consists entirely of defective clusters. If that is so, why is it said: “When you harvest the grapes of your vineyard, do not take the defective clusters”? [This teaches that] the poor have no right to claim the defective clusters before the harvest.