Griffithes Wheeler Thatcher, 1911 Encyclopædia Britannica, Volume 14… (1911)
“ IBN ṢA‛D [Abū ‛Abdallāh Maḥommed ibn Ṣa‛d ibn Mani‛ uz-Zuhrī] , often called Kātib ul-Waqidī (“secretary of Waqidī”) of Baṣra] (d. 845) , Arabian biographer, received his training in tradition from Waqidī and other celebrated teachers. He lived for the most part in Bagdad, and had the reputation of being both trustworthy and accurate in his writings, which, in consequence, were much used by later writers. ”
