Abū Mūsā al-Madīnī, Muḥammad b. Abī Bakr ʿUmar b. Aḥmad b. ʿUmar b. Muḥammad al-Iṣfahānī (501–581/1108–1185), was a famous Shāfiʿī traditionist. He became known as al-Madīnī because he was born in Madīna-yi Iṣfahān, this being the district of Iṣfahān now called Jay, which in Yāqūt's time went under the name of Shahristān (Yāqūt, al-Mushtarak, 389). Abū Mūsā's father was also a learned man (al-Dhahabī, Siyar, 21/152). As a result of his father's efforts, Abū Mūsā was able to learn ḥadīth, and thus receive blessings in…