Muhammad ibn al-Qasim () was an official of the Abbasid Caliphate who served briefly as vizier in JulyâÂÂOctober 933 under Caliph al-Qahir (r. 932âÂÂ934). He hailed from a family of Nestorian Christian origin that had served in the caliphal bureaucracy since late Umayyad times, and was the son, grandson, great-grandson and brother of viziers.