Mishnà su Esodo 23:19

These are the things that have no definite quantity: The corners [of the field]. First-fruits; [The offerings brought] on appearing [at the Temple on the three pilgrimage festivals]. The performance of righteous deeds; And the study of the torah. The following are the things for which a man enjoys the fruits in this world while the principal remains for him in the world to come: Honoring one’s father and mother; The performance of righteous deeds; And the making of peace between a person and his friend; And the study of the torah is equal to them all.

For what reason may he not bring them? Because it is said, “The first-fruits of your land” (Exodus 23:19) until all of their growth is on your land. Sharecroppers, leasers, or occupiers of confiscated property (sikarikon), or a robber does not bring them for the same reason, because it says, “The first-fruits of your land.”

From where do we know that one is responsible [for his bikkurim] until he brings them to the temple Mount? Because it says: “The first of the first-fruits of your land you shall bring into the house of the Lord your God” (Exodus 23:19) this teaches that he is responsible until he brings them to the Temple Mount. If he brought [bikkurim] of one kind and made the recital and then brought of another kind, he does not make a [second] recital.

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.

From where do we derive that first-fruits must precede terumah, seeing that this one is called “terumah” and “the first” and the other is [also] called “terumah” and “the first”? Rather first-fruits take precedence since they are the first fruits of all produce. And terumah comes before the first tithe also because it is called “first.” And first tithe [precedes second tithe,] because it includes that which is called “first.”

These may be given to any priest:Devoted things (haramim); Firstlings; The redemption of the first born; The [lamb substituted as] ransom for the firstling of a donkey; The shoulder, the two cheeks and the maw; The first of the fleece; Oil [fit only] for burning; Consecrated food [which must be eaten] within the Temple; And bikkurim. Rabbi Judah prohibits bikkurim. Vetches of terumah: Rabbi Akiva permits, But the sages prohibit.