Sefer Mitzvot Gadol

Sefer Mitzvot Gadol (Hebrew: ספר מצוות גדול; in English: "The Great Book of Commandments"; abbreviated: סמ"ג‎, "SeMaG") work of halakha by Moses ben Jacob of Coucy, containing an enumeration of the 613 commandments.

[1][2] The arrangements and the presentation are strongly influenced by the discussions of Maimonides about the commandments, which are found in Sefer HaMitzvot and Mishneh Torah.

Unlike Maimonides, Rabbi Moses ben Jacob presents long discussions of the different interpretations and legal opinions.

The work also makes extensive use of other legal codes, especially the comments of Rashi and the Tosafists, normally favoring the Ashkenazi traditions over the opinion of Maimonides.

The Sefer Mitzvot Katan ("SeMaK") by Rabbi Isaac ben Joseph of Corbeil, is a summary of the "SeMaG", including additional material about ethics and legends (aggadah).

Manuscript fragment of Sefer Mitzvot Gadol, 13th century