Mishnà su Deuteronomio 15:1

Rabbi Eliezer says: a piece of ground [large enough to plant] one fourth of a kav is liable for peah. Rabbi Joshua says: it must [be large enough] to grow two seahs. Rabbi Tarfon says: it must be six by six handbreadths. R. Judah ben Batera says: [it must be large enough] for a sickle to cut at least two handfuls and the halakhah is according to his words. Rabbi Akiva says: any size of land is liable for peah and for first-fruits, and [is sufficient] for the writing of the prozbul, and also to acquire through it movable property by money, by deed, or by a claim based on undisturbed possession.

One who returns a debt [after] the seventh year, the [creditor] must say to [the debtor]: “I remit it.” But [the debtor] should say: “Even so [I will repay it].” [The creditor] may then accept it from him, because it says: “And this is the word of the release” (Deuteronomy 15:2). Similarly, when [an accidental] killer has been exiled to a city of refuge, and the citizens want to honor him, he must say to them: “I am a murderer.” If they say: “Even so, [we want to honor you], then he may accept [the honor] from them, because it says: “And this is the word of the murderer” (Deuteronomy 19:4).