Weekly Freebies: Yesodei Yeshurun

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R. Gedalia Felder was a long-time rabbi and widely recognized posek in Toronto (brief bio). His most famous books were the six Hebrew volumes of Yesodei Yeshurun on the laws of prayer, Shabbos and Pesach. All six volumes are available for free download on HebrewBooks:
Vol. 1
Vol. 2
Vol. 3
Vol. 4
Vol. 5
Vol. 6

About Gil Student

Rabbi Gil Student is the Editor of TorahMusings.com, a leading website on Orthodox Jewish scholarly subjects, and the Book Editor of the Orthodox Union’s Jewish Action magazine. He writes a popular column on issues of Jewish law and thought featured in newspapers and magazines, including The Jewish Link, The Jewish Echo and The Vues. In the past, he has served as the President of the small Jewish publisher Yashar Books and as the Managing Editor of OU Press. Rabbi Student currently is serving his third term on the Executive Committee of the Rabbinical Council of America and also serves as the Director of the Halacha Commission of the Rabbinical Alliance of America. He serves on the Editorial Board of Jewish Action magazineand the Board of OU Press. He has published four English books, the most recent titled Search Engine volume 2: Finding Meaning in Jewish Texts -- Jewish Leadership, and served as the American editor for Morasha Kehillat Yaakov: Essays in Honour of Chief Rabbi Lord Jonathan Sacks.


  1. R Gedalia Felder’s Nachalat Zvi was used as a source by many for geirus issues-he touches on it in that book.
    Of interest from linked bio is “Felder did not cut himself off from non-Orthodox Jews, participating in the Toronto Rabbinical Fellowship, which brought together for discussion rabbis of various denominations”

  2. Gaon atzum v’adir sh’ein kamohu b’limmud, b’middos, u’bma’assim b’dor hazeh.

    Ari Enkin

  3. Was also super kind to us kids who were zocheh to daven at his shul. Warm heart came through his smile. Had an extensive library of shu”tim and was extremely erudite and he was also very broad-minded.

  4. Rav Felder Zt”l, has been succeeded by his son, Yaacov, shlit”a as Rav of Shomrei Shabbos Chevrah Mishnyoth Congregation in Toronto.

  5. ” Mair Zvi on September 18, 2011 at 11:54 am
    Rav Felder Zt”l, has been succeeded by his son, Yaacov, shlit”a as Rav of Shomrei Shabbos Chevrah Mishnyoth Congregation in Toronto.”

    Rav Felder’s son R A Felder of NE Philly has written sefarim and at least one popular book of the laws of mourning.

  6. I understand he was a cousin of Rav Gedalia Schorr ztl – named after the same relative.

  7. I received the folllowing from one of the Baker Street Irregulars-I am posting it just eliminating names not R Felder. It shows that Kashrut depends on what is on the ground -not solely theory from the BM.

    “at Rabbi Felder’s house, and took the opportunity to ask him about the kashrut of canned tuna fish. (Recall that …had questioned the kashrut of canned tuna fish, even that with a hechsher, on the grounds that tuna fishing boats often catch other species that look very similar to tuna, and these species get canned and sold as tuna.) Rabbi Felder responded that he had once gone to Halifax and spoken with a fisherman. The fisherman told Rabbi Felder that he, like any of the men on tuna boats, could easily tell the difference between tuna and dolphins, etc., and they better be able to because they’d get into trouble with the Canadian authorities if they sold dolphins, etc., as tuna fish.”

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