What halachot require a mesorah in order to be done correctly? (Meaning, reading them from a book is not sufficient)


  • 1
    Which ones don't?
    – Double AA
    Aug 23, 2022 at 18:35
  • @DoubleAA Avraham managed to do אנכי ה' without one
    – Heshy
    Aug 23, 2022 at 19:35
  • @DoubleAA reading and following a certain halacha in the Shulchan Aruch or Rambam does not.
    – Yishaq
    Aug 23, 2022 at 20:28
  • 4
    @Yishaq Doing it right certainly does. You can read and guess all you want.
    – Double AA
    Aug 23, 2022 at 21:01
  • 1
    Mareot in hilchot niddah
    – kouty
    Aug 23, 2022 at 21:03

1 Answer 1


Shechita and Bedika of the lungs require a ksav Kabbalah from a Rav as per a cheirem instituted in the times of the Rishonim. See Simla Chadasha 1:5

Regarding Nikkur the Rema YD 64:7 and 65:8 states clearly that it cannot be learned from a sefer and must be done with apprenticeship

הגה וסדר ניקור אלו החלבים צריך ראיה מן הבקי בניקור ואי אפשר לבאר היטב בספר

ואין ללמוד סדר הניקור רק במראית העין מן המומחה הבקי בניקורו ד"ע

Kashrus of some birds and animals are reliant solely on Mesorah (YD 80-82)

A sofer and Mohel traditionally apprenticed before embarking on their own.

I’m sure there’s additional examples, anyone can feel free to add.

  • Thank you so much. I would love to see if anyone can extended this list.
    – Yishaq
    Aug 24, 2022 at 13:17

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