A report on Arba'ah Turim, Semikhah and Joseph Karo

The best-known commentary on the Arba'ah Turim is the Beit Yosef by rabbi Joseph ben Ephraim Karo: this goes beyond the normal functions of a commentary, in that it attempts to review all the relevant authorities and come to a final decision on every point, so as to constitute a comprehensive resource on Jewish law.

Berab exerted great influence upon him, and Karo became an enthusiastic supporter of Berab's plans for the reinstitution of semicha (rabbinical ordination) which had been in abeyance for over 11 centuries.

Students of the Shulchan Aruch, particularly in Orthodox Semikhah programs, typically study the Tur and the Beit Yosef concurrently with the Shulchan Aruch itself: in some editions the two works are printed together, to allow comparison of corresponding simanim.

The examination has a dual concern: firstly it confirms knowledge of the law as presented in Shulchan Aruch, the standard code of law (with more recent applications from relevant teshuvot, or responsa); secondly, it also confirms an understanding of the underlying principles, by testing the relevant Talmudic sugyas, together with their development in the Rishonim and Acharonim, especially the Tur; see.

Beit Yosef (בית יוסף), a commentary on Arba'ah Turim, the current work of Jewish law in his days. In this commentary Karo shows an astounding mastery over the Talmud and the legalistic literature of the Middle Ages. He felt called upon to systematize the laws and customs of Judaism in face of the disintegration caused by the Spanish expulsion.

Berab then conferred semikhah through a laying on of hands to four rabbis, including Joseph Karo, who was later to become the author of the Shulchan Aruch, widely viewed as the most important code of Jewish law from the 17th century onwards.