Demai

There are several opinions concerning the word's etymology. According to Maimonides[8] and Rabbi Obadiah ben Abraham,[9] the word originates from a contraction of the two Aramaic words דא מאי meaning "doubtful" (literally, "what is this?"). Another possibility is that the word originates from a corruption of the Hebrew word דמע, "things holy", in this case referring to something which may still contain the elements of "things holy".[7][10]

The heave-offerings, both terumah and terumat ma'aser, could not be eaten by non-priests; the second tithe, unless redeemed with "silver," which was to be spent on food in Jerusalem, could not be eaten outside that city; while the first tithe and the tithe for the poor were not subject to any restrictions. Conscientious Jews would not partake of the produce of the land unless they had first satisfied themselves that the heave-offering and tithes had been duly separated. The owners of land in the Land of Israel were divided into three classes; (1) non-Jews, to whom the Jewish laws about tithes did not apply; (2) the trustworthy Jews ("ne'emanim" or "chaberim"), who were sure to separate from the produce all that was due according to the Law; and (3) the am ha'aretz, who was suspected of neglecting these laws. Produce bought of any person of the first class was considered as unprepared—i.e., as produce from which heave-offering and tithes had not been separated; that bought of the second class was "metukkan" (prepared); and that bought of the third class was "demai" (doubtful, or suspected).[7]

The conscientious never partook of demai without first separating the tithes due thereon. It was not necessary, however, to separate all the dues enumerated above, as no one was suspected with regard to the heave-offering, for two reasons: first, it was not burdensome, as the minimum quantity satisfied the Law,[11] and, secondly, the offense of neglecting it was considered very serious.[12] It was therefore only necessary to mark out the first tithe and the second. Of the former, one-tenth was separated as "the heave-offering of the tithe," and the remaining nine-tenths were retained by the owner, as the Levite was unable to prove his claim. The second tithe could be redeemed without the addition of one-fifth of its value.[13] These regulations concerning demai are ascribed to the high priest John Hyrcanus, who inquired into the matter and discovered the fact that most people only separated the heave-offering and neglected the tithes.[14][7]

 This article incorporates text from a publication now in the public domain: S. S. M. F. (1901–1906). "Demai". In Singer, Isidore; et al. (eds.). The Jewish Encyclopedia. New York: Funk & Wagnalls. Retrieved 11 June 2013. It has the following bibliography:

• Z. Frankel, Hodegetica in Mishnam, Leipsic, 1859:
• idem, Introductio in Talmud Hierosolymitanum, Breslau. 1870;
• Maimonides, Yad, Ma'aser, ix.;
• Kohut, Aruch Completum, s.v.