bi ’llāh , Abū D̲j̲aʿfar Muḥammad b. D̲j̲aʿfar , ʿAbbasid caliph, reigned 247-8/861-2, and son of the preceeding caliph al-Mutawakkil by a Greek slave concubine Ḥubs̲h̲iyya.

Towards the end of al-Mutawakkil’s reign, it had been the aim of his vizier ʿUbayd Allāh b. Yaḥyā b. K̲h̲āḳān to get the succession changed from the caliph’s original choice as walī al-ʿahd to another son al-Muʿtazz. Al-Muntaṣir was involved in the conspiracy of the Turkish soldiery which led to the caliph’s death [see al-mutawakkil ], and himself received the bayʿa [q.v.] at the palace of al-D̲j̲aʿfariyya on …