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Mekhilta DeRabbi Shimon bar Yochai מכילתא דרבי שמעון בר יוחאי

The "other" Mekhilta — the Akiva school's halakhic midrash on Shemot. Lost as a book after the Middle Ages and recovered in modern times from citations and genizah fragments, it completes the pairing that runs through the halakhic midrashim: for most of the Torah's legal books, both great tannaitic schools left a commentary.

I. Who

Hebrew
מכילתא דרבי שמעון בר יוחאי
Also known as
Mekhilta DeRashbi
Era
tannaim

II. When

Traditional
tannaitic; from the school of R' Akiva, redacted after the Mishnah
Civil (computed)
3990–4110 AM · 230–350 CE
Academic
redacted c. 3rd–4th c. CE in Eretz Yisrael from tannaitic material
Duration
≈120 years
Precision
disputed

IV. What

Language
Mishnaic Hebrew
Redaction
Anonymous; assigned by its hermeneutical fingerprint to the school of R' Akiva (Rabbi Akiva), the counterpart of the Yishmael-school Mekhilta (Mekhilta DeRabbi Yishmael). The association with R' Shimon bar Yochai rests on medieval citation habits and the prominence of his teachings in it, not on a Talmudic statement.
Structure
A halakhic midrash on Shemot, running as verse-commentary across the legal portions of the book — the Akiva-school parallel to the Yishmael-school Mekhilta, frequently deriving the same laws by different hermeneutical routes.

V. How do we know

ClaimEvidenceConfidenceSources
The work is a tannaitic halakhic midrash on Shemot whose terminology and hermeneutics mark it as a product of R' Akiva's school, standing opposite the Mekhilta of R' Yishmael's school on the same book. rabbinic reconstruction ★★★☆☆
The book ceased to be copied and was lost after the Middle Ages; it was recovered in the modern era from its quotations in Midrash HaGadol and from Cairo Genizah fragments — first reconstructed by D.Z. Hoffmann (1905), then critically by Epstein and Melamed (1955). reconstruction ★★★★☆
The title's attribution to R' Shimon bar Yochai reflects rishonim's citation practice and the work's opening material rather than an ancient authorship statement; like the other halakhic midrashim it is a school-corpus, so the atlas records no author edge. tradition reconstruction ★★★☆☆
  • J.N. Epstein, Prolegomena to Tannaitic Literature (1957); Stemberger, Introduction to the Talmud and Midrash