 This discovery is known as, and is contained in, the "Iggul [Cycle] di R. Nahshon," which work was printed with the "She'erit Yosef" of Joseph b. Shem-Ṭob b. Joshua (1521).Nahshon and his son Hai Gaon did not approve of saying the "Kol Nidre" on the eve of Yom Kippur.Most of his responsa, contained in the collection "Sha'are Ẓedeḳ," are written in Aramaic in a curt, difficult style; but the responsa ascribed to him in "Teshubot Ge'onim Ḳadmonim" are written in mixed Hebrew in a plain, easy diction.