Terumot

Terumot (, lit. "Priestly dues" and often, "heave-offering") is the sixth tractate of "Seder Zeraim" ("Order of Seeds") of the Mishnah and of the Jerusalem Talmud. This tractate discusses the laws of teruma, a gift of produce that an Israelite farmer was required to set aside and give to a "kohen" (priest). There were two kinds of "terumot" given to the priest: the regular heave-offering, known also as the "terumah gedolah" ("great heave-offering"), which the Israelites were required to give to the priest from the produce of their fields; the other was the "terumat ma'aser" ("tithe of the heave-offering"), namely, the gift that the Levites were required to put aside for the priests from the tithe which ordinary Israelites had been required to give to them.
The laws detailed in this tractate are derived from the Torah in and , and for "terumat ma'aser" from .
The mitzvah (commandment) applies only to produce grown in the Land of Israel and continues to be observed in the modern state of Israel.
This tractate comprises eleven chapters in the Mishna and ten in the Tosefta and has fifty-nine folio pages of Gemara in the Jerusalem Talmud. Like most tractates in the order of "Zeraim", there is no Babylonian Talmud for this tractate. Laws concerning terumah are also mentioned in the tractates "Demai" and "Ma'aserot".
Subject matter.
This tractate focuses on the laws of the gifts of produce that are to be given to a "kohen" (priest) as mandated by the Torah. Terumah is the first gift that must be separated from the produce and given to the priest, as prescribed in Numbers ( and ) and Deuteronomy ().
The Hebrew term "terumah" signifies a contribution, an offering for a sacred purpose, and more literally, something lifted up (hence the antiquated English translation, "heave offering"). In the Torah, the commandment applied to grain, wine and oil; the Mishna extends the scope to include all produce. It also applied only in the Land of Israel, but certain lands bordering the Land of Israel, and Babylonia were later included. 
Since the priests and Levites were not allocated land in of the Land of Israel, they were provided for in the form of tithes given to the Levites and the "terumot" offerings given to the priests by both the Levites and the ordinary Israelites. The Levites were required to separate and give the priest one-tenth of the tithe that they received from the Israelite farmers and this was called "terumat ma'aser" ("offering of the tithe"), or "ma’aser min hama’aser" (tithe of the tithe). The Israelites, on the other hand, separated the "terumah gedolah" to be given to the priests before they separated a tenth of the produce to be given as tithe to the Levites. Both types of gifts come under the general term of "terumah", which forms the theme of this tractate, but the "terumah gedolah" of the Israelite farmers comprises the main subject of discussion. 
The Torah does not specify the amount of "terumah" that must be given, and theoretically, even one single kernel of grain could suffice; thus the Mishna in this tractate establishes an amount, from one-fortieth to one-sixtieth of the gross product, depending on the circumstances and generosity of the individual farmer, with one-fiftieth being regarded as the average gift. The generally accepted measure is therefore one-fiftieth, and the Sages found an allusion to this amount in the term "terumah" as an acronym of the Aramaic words "trei mi-meah" ("two from a hundred") or 2%.
The tractate deals with the details of many circumstances which could arise with regards to the "terumah". Thus, for example, before the "terumah" is separated, all the produce is "tevel" (untithed) and forbidden to be eaten. "Terumah" is considered holy, and may be eaten by priests only, as prescribed in Leviticus 22:10, and must be guarded against becoming ritually unclean, lost or wasted, as interpreted from Numbers 18:8. The Mishna also considers what to do in cases where "terumah" became mixed with non-sacred food; if the ratio is less than one hundred times that of "terumah", it determines that all of it becomes forbidden to non-priests. However, it is not necessary to give the mixture to the priest, rather it is sold to a priest at the price of "terumah", which was fixed lower than ordinary produce, while deducting the value of the "terumah" mixed into it. If the ratio of non-sacred food exceeds one hundred-times than that of the "terumah", a non-priest may eat it, after removing the quantity of the "terumah" that had fallen into it and giving it to the priest.
Structure and content.
The tractate consists of eleven chapters and 101 paragraphs ("mishnayot"). It has a Gemara – rabbinical analysis of and commentary on the Mishnah – of 59 double-sided pages in the Jerusalem Talmud. There is a Tosefta of ten chapters for this tractate.
There is no Gemara in the Babylonian Talmud for this tractate, or indeed for any of the tractates of this order of the Mishnah, other than Tractate Berakhot, as the laws related to agriculture and produce that are mostly discussed in this order generally have no practical application outside of the Land of Israel.
In most editions of the Mishnah, this tractate is sixth in the order Zera'im. Maimonides, in his "Commentary on the Mishnah", states that this tractate follows Shevi'it since "terumah" is the first gift which one separates from the produce.
An overview of the topics of the chapters is as follows:
Historical context and influence.
The commandment of "terumah" applies only to produce grown in the Land of Israel and continues to be observed in the modern state of Israel. There is debate among Jewish legal authorities as to whether the present-day Jewish religious laws detailed in this tractate are now biblically or rabbinically mandated obligations.
Mishna 8:12 of this tractate is a digression from the laws of "terumah" but is included in this tractate because it contains a similar case to the preceding mishna about pagans intent on defilement – in the previous mishna of a commodity and in this, of a person. This mishna has become a source of Jewish law for the general principle that it is not permitted to sacrifice one individual to save other. Tosefta 7:23 of this tractate, quoted in the Jerusalem Talmud () expands the ruling of the mishna to a case where if one member of a group is not delivered to be killed, the entire group will be killed. The ruling is the same as in the mishna, that all should die rather than sacrifice one to save the others. However, if one individual was specified by the persecutors, then other factors can be considered, such as whether that individual is already subject to capital punishment for a crime they have committed. Many medieval and modern Jewish legal scholars have grappled with the practical applications of the cases mentioned in this tractate, often when facing situations involving persecution, in the Middle Ages during the Crusades, the Rintfleisch massacres or other anti-Jewish violence, and in modern times during the Holocaust.
Commentaries.
Medieval commentaries on this tractate include the following:
Commentaries by later scholars include the following: 