Half a century later the famous Gaon Seadiah, also of Sura, issued his Siddur, in which the rubrical matter is in Arabic. Besides the Siddur, or order for Sabbaths and general use, there is the Mahzor (cycle) for festivals and fasts.
His poetical gifts he turned to admirable account in his translation of the Festival Prayers (Mahzor, 9 vols., 1855), a new feature of which was the metrical rendering of the medieval Hebrew hymns.