Ali ibn Musa al-Rida was a descendant of the Islamic prophet Muhammad and the eighth of the Twelve Imams, succeeding his father Musa al-Kazim and his grandfather Ja'far al-Sadiq. His lineage traces through Ali and Fatima, via the line of Husayn. He is also part of the chain of mystical authority in Sunni Sufism. A number of works are attributed to him, including Sahifah al-Rida, Fiqh al-Rida, and Al-Risala al-Dhahabiyya, the most precious Islamic work in the Science of Medicine. Uyoun Akhbar Al-Rida includes his debates with scholars of various religions, biographical details, and even the miracles which have occurred at his shrine.