Abu al-Hasan Ali ibn Muhammad al-Samarri

Abū al-Ḥasan ʿAlī ibn Muḥammad al-Sammarī
أبو الحسن علي بن محمد السمري
Deputy of Imam Muhammad al-Mahdi
In office
937–941
Preceded byAbu al-Qasim al-Husayn ibn Ruh al-Nawbakhti
Succeeded byAbolished (Major Occultation starts)
Personal life
Died941 CE
Known forLast of the Four Deputies
Religious life
ReligionIslam
DenominationShia
JurisprudenceJa'fari
CreedTwelver
Muslim leader
Disciple ofHasan al-Askari, Muhammad al-Mahdi
Influenced
  • Twelver Shi'ites

Abu al-Hasan Ali ibn Muhammad al-Samarri (Arabic: أبو الحسن علي بن محمد السمري) was the last of the Four Deputies, who are believed by the Twelvers to have successively represented their Hidden Imam, Muhammad al-Mahdi, during his Minor Occultation (874–941 CE). Al-Samarri in this role succeeded Abu al-Qasim al-Husayn ibn Ruh al-Nawbakhti in 937.

Al-Samarri is said to have received a letter from Muhammad al-Mahdi shortly before his death in 941 CE. The letter predicted the death of al-Samarri in six days and announced the beginning of the complete occultation, later called the Major Occultation, which continues to this day. The letter, ascribed to Muhammad al-Mahdi, added that the complete occultation would continue until God granted him permission to manifest himself again in a time when the earth would be filled with tyranny.