Yehudai ben Nahman or Yehudai Gaon (Hebrew: יהודאי גאון) was the head of the yeshiva in Sura from 757 to 761, during the Gaonic period of Judaism. He was originally a member of the academy of Pumbedita, but the exilarch Solomon ben Hisdai appointed him as Gaon of Sura as "there is no one there (at Sura) as distinguished as he is for wisdom".
He waged a strong campaign, continued by his disciple Pirkoi ben Bavoi, for the acceptance of the Babylonian Talmud as the standard for Jewish law in all countries. This was opposed by the Jews of Eretz Yisrael, who relied on the Jerusalem Talmud and their own older traditions. Yehudai argued that, as a result of Byzantine persecution, the Jews of Eretz Yisrael had only preserved Jewish tradition in a fragmentary and unreliable form.
He was author of the book Halachot Pesukot, which discusses those halachot that were practiced in the Diaspora since the destruction of the Second Temple. The text, which is generally organized along the same pattern as the tractates of the Babylonian Talmud, was the subject of many abridgements and summaries. The original was lost for many years, and was only known in the form of a Hebrew paraphrase called Hilchot Re'u (published Versailles 1886), until it was discovered in a Yemenite manuscript and published in Jerusalem in 1950.
One current of rabbinic and scholarly opinion also credits him with authorship of the Halachot Gedolot, or of the core of it, though it is generally agreed that the final form of that work is to be attributed to Simeon Kayyara. At all events the Halachot Pesukot was an important source for the larger work.
- ↑ Letter of Sherira Gaon.
- ↑ See Iggeret Pirkoi ben Bavoi, Ginzberg, Geonica pp. 48-53; idem, Ginze Schechter, pp. 544-573; Lewin, Tarbiz vol. 2 pp. 383-405; Mann, R.E.J. vol. 20 pp. 113-148. It is reprinted in Toratan shel Geonim.
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