Kol Bo

Kol Bo (Hebrew: כל-בו) is a collection of Jewish ritual and civil laws. The meaning of the title is all is in it. Its author has not yet been ascertained. The work in content resembles other codes, as, for instance, the Orḥot Ḥayyim, though in its form it is very different.

The Kol Bo does not pretend to any order; the laws that were later arranged in Oraḥ Ḥayyim are found together with those that were later arranged in Yoreh De'ah and Eben ha-'Ezer. Likewise, many laws are entirely missing in the Kol Bo. It is peculiar also in that some of the laws are briefly stated, while others are stated at great length, without division into paragraphs.

After the regular code, terminating with the laws of mourning (No. 115), there comes a miscellaneous collection, containing the "taḳḳanot" of R. Gershom and of Jacob Tam, the Ma'aseh Torah of Judah ha-Nasi I, the legend of Solomon's throne, the legend of Joshua b. Levi, a cabalistic dissertation on circumcision, a dissertation on gemaṭria and noṭariḳon, sixty-one decisions of Eliezer b. Nathan; forty-four decisions of Samson Zadok (TaShBeẒ), decisions of Isaac of Corbeil, and responsa of Perez ha-Kohen, decisions of Isaac Orbil, of the geonim Naṭronai, Hai Gaon, Amram Gaon, Nahshon Gaon, laws of the "miḳweh" taken from Perez's Sefer ha-Miẓwot, responsa, and finally the law of excommunication of Naḥmanides. For this reason it is quoted under the title of "Sefer ha-Liḳḳuṭim" in Abḳat Rokel, No. 13.

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