Abū Baṣīr, the common title of two narrators of ḥadīth in the Imāmī Shiʿi tradition, both of whom were amongst the disciples of the Shiʿi Imams Muḥammad al-Bāqir and Jaʿfar al-Ṣādiq. Their names were Yaḥyā b. Abī al-Qāsim al-Asadī and Layth b. al-Bakhtarī al-Murādī. The name of Abū Baṣīr appears in the chains of narrators (isnād, pl. asānīd) of many Shiʿi narrations without any other distinguishing title or name; only through circumstantial e…