Origins & Early Life

Ali ibn Musa al-Rida (Arabic: علي بن موسى الرضا, romanized: ʿAlī ibn Mūsā al-Riḍā, c. 1 January 766 – c. 6 June 818), also known as Abū al-Ḥasan al-Thānī, was a descendant of the Islamic prophet Muhammad, and the eighth Imam in Twelver Shia Islam, succeeding his father, Musa al-Kazim, in 799 CE. He is also part of the chain of mystical authority in Sunni Sufi orders.

Pivotal Works & Achievements

He was known for his piety and learning, and a number of works are attributed to him, including Al-Risalah al-Dhahabiah, Sahifah of al-Ridha, and Fiqh al-Rida. Uyoun Akhbar Al-Ridha by Ibn Babawayh is a comprehensive collection that includes his religious debates and sayings, biographical details, and even the miracles which have occurred at his tomb. He is buried in Mashhad, Iran, site of a large shrine. Al-Rida was contemporary with the Abbasid caliphs Harun al-Rashid (r. 786–809) and his sons, al-Amin (r.

Enduring Legacy & Impact

809–813) and al-Ma'mun (r. 813–833). In a sudden departure from the established anti-Shia policy of the Abbasids, possibly to mitigate the frequent Shia revolts, al-Mamun invited al-Rida to Merv in Khorasan, his de facto capital, and designated him as heir apparent, despite the reluctance of the al-Rida who accepted...

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