ʿAbd Allāh b. Salām, Abū Yūsuf ʿAbd Allāh b. Salām b. al-Ḥārith al-Isrāʾīlī al-Khazrajī al-Anṣārī (d. 43/663), one of the Prophet's Companions. He came from a Jewish tribe, the Banū Qaynuqāʿ, in Medina, and was an ally of the Khazraj tribe (al-Kalābādhī, 1/390; Ibn Manjawayh, 1/344–345; al-Ṣanʿānī, 6/54). ʿAbd Allāh was a scholar of the Jewish religion and recognised as a rabbi (ḥabr) (al-Ṭabarī, 19/113, 143; al-Ikhtiṣāṣ, 43; Taʾrīkh, 2/230; al-Qurṭubī, 6/13). He apparently lived in one of the Jewish settlements outside the city of Medina (al-Bayhaqī, 2/459). So…