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Abū Yaʿqūb al-Sijistānī
(6,161 words)

Abū Yaʿqūb al-Sijistānī (Sijzī), Isḥāq b. Aḥmad, was a distinguished Ismaili dāʿī (summoner) who lived in the 3rd/9th and 4th/10th centuries. He was particularly active in Sīstān and Khurāsān and wrote numerous treatises on Ismaili ‘theosophy’ (al-ḥikma al-ilāhiyya) and in defence of Ismaili doctrine. Most of these works have been published during the last fifty years. Until the middle of the 14th/20th century, these works were preserved only in manuscript form …

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Zaryab, Abbas and Translated by Farzin Negahban, “Abū Yaʿqūb al-Sijistānī”, in: Encyclopaedia Islamica, Editors-in-Chief: Farhad Daftary. Consulted online on 05 June 2023 <http://dx.doi.org/10.1163/1875-9831_isla_COM_0162>
First published online: 2015

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