Abū Yaʿqūb al-Sijistānī - Encyclopaedia of Islam, THREE
[Article]
Walker, Paul E.
Leiden
Brill
(1,154 words)
Abū Yaʿqūb al-Sijistānī (or alternately al-Sijzī) was the major philosophical theologian of Ismāʿīlī Shīʿism in the mid-fourth/tenth century. Although he was put to death by the Ṣaffārid governor of Sijistān at an uncertain date (but not long after 361/971), his writings continued to have great influence with Ismāʿīlī writers to the end of the Fāṭimid period. Later treatises, notably some by Nāṣir-i Khusraw (d. after 465/1072), contain passages that simply quote or paraphrase his work. Even later, the Ṭayyibī daʿwa in Yemen and