He was the teacher of Shem Tov ibn Gaon and Nathan b. Judah, and the friend of Bahya ben Asher, who mentions him in his Pentateuch commentary.§ Beshallaḥ He is also mentioned by Mordechai ben Hillel (d. 1310); and was still living in 1305; as on July 26, 1305 he subscribed to Solomon ben Adret's excommunication against the study of metaphysics by anyone under the age of thirty. He was probably one of the rabbis of Barcelona. He wrote a commentary on the Machzor,Lonsano, "Shete Yadot," 62a and a halakhic commentary to the "Azharot" of Solomon ibn Gabirol.Paris, Bibliothèque Nationale, No. 273, 2
