Abū Jaʿfar Muslim ibn ʿUbayd Allāh al-Ḥusaynī (Arabic: أبو جعفر مسلم الحسيني; died 976/7) was a Husaynid and the most prominent member of the ashraf families of Egypt during the late Ikhshidid dynasty and the early Fatimid Caliphate.
The latter was a proud and haughty man who possessed military ability, as he was entrusted with commanding an army and gubernatorial office by the Ikhshidid strongman Abu al-Misk Kafur.
Abu Ja'far's travails with Kafur's court fool, Sibawayh, who played pranks on him and called him a "Meccan paedophile" reveal, according to Bianquis, a humility of character bordering on pusillanimity.
[2][8] As the Ikhshidid troops briefly resisted the Fatimid advance, the amān was void, and Abu Ja'far was tasked with approaching Jawhar to secure its renewal.
[16] When al-Mu'izz moved his court from Ifriqiya to Egypt in 973, Abu Ja'far went to Alexandria at the head of a delegation of notables to meet and accompany him during the last part of his journey to Cairo.
[1][17] The Fatimid ruler showed particular care for Abu Ja'far, insisting that he ride a palanquin, since the hot June sun and the ongoing Ramadan fast made travel difficult for a man of his years.