Griffithes Wheeler Thatcher, 1911 Encyclopædia Britannica, Volume 14… (1911)
“ IBN ISHĀQ [Mahommed ibn Isḥāq Abū ‛Abdallāh] (d. 768) , Arabic historian, lived in Medina, where he interested himself to such an extent in the details of the Prophet’s life that he was attacked by those to whom his work seemed to have a rationalistic tendency. He consequently left Medina in 733, and went to Alexandria, then to Kufa and Hira, and finally to Bagdad, where the caliph Manṣūr provided him with the means of writing his great work. ”
