Nathan P. Gibson, Vanessa Birkhahn and Hanna Friedel, (eds.), "Abū ʿAbd Allāh Muḥammad ibn Dāwūd ibn al-Jarrāḥ — أبو عبد الله محمد بن داود بن الجراح " in Communities of Knowledge: Interreligious Networks of Scholars in Ibn Abi Usaybiʿa’s History of the Physicians last modified June 23, 2021, https://usaybia.net/person/80 Abū ʿAbd Allāh Muḥammad ibn Dāwūd ibn al-Jarrāḥ أبو عبد الله محمد بن داود بن الجراح Abū ʿAbd Allāh Muḥammad ibn Dāwūd ibn al-Jarrāḥ, secretary of several Abbāsid caliphs (d. 296/908) https://usaybia.net/person/80 secretary Muslim A literary history of medicine: the 'Uyūn al-anbā' fī ṭabaqāt al-aṭibbā' of Ibn Abī Uṣaybi'ah 8.4.12