(fl. 9th cent.)
Babylonian gaon of the academy at Sura (853-6). He was one of the most prolific writers of responsa among the geonim in the 9th century. His responsum to a query from the Lucena Jewish community as to how to fulfil the rabbinic dictum to recite 100 benedictions daily became the basis of the prayerbook.
Dictionary of Jewish Biography. Dan Cohn-Sherbok.