Born in Aden, Fārisī worked at the Rasulid court of the sultan al-Muẓaffar Yūsuf (1249?–95). Astronomical treatises ascribed to him include: 1) The Tuḥfat al-rāghib wa-turfat al-ṭālib fī taysīr al-nayyirayn wa-ḥarakāt al-kawākib, a treatise on folk astronomy in 12 chapters; 2) al-Zīj al-mumtaḥan al-muẓaffarī (also al-Zīj al-mumtaḥan al-khazā’inī), dedicated to Fārisī’s patron, al-Muẓaffar Yūsuf and written for the sultan’s treasury (al-khazā’in). Most of the treatises mentioned by Fārisī are no longer extant, and al-Zīj al-mumtaḥan al-muẓaffarī is the only source providing us material about them. Also compiled for the sultan was Fārisī’s Nihāyat al-idrāk fī asrār `ulūm al-aflāk, a treatise on astrology, and known outside the Yemen. In the introduction 3 other works by Fārisī are mentioned: one deals with sundials (al-Risāla al-ẓilliyya or Risālat al-ẓill al-mabsūṭ); another contains an eclipse computer (al-Risāla al-muẓaffariyya fī al-`amal (or bi-’l-āla?) al-musammā bi-’l-ṣafīḥa al-jawzahariyya); the third treatise mentioned may be Fārisī’s Zīj. The first 2 works are no longer extant. Also known outside the Yemen was Fārisī’s Kitāb Ma`ārij al-fikr al-wahīj fī ḥall mushkilāt al-zīj. There is an Arabic translation made by Fārisī of an astrological treatise written by Jāmāsp, a contemporary of Zarathustra preserved in a single copy in Milan. [Schmidl, BEA]