He was born in
Qom to Sayyid Ahmed Shubairi Zanjani in Azerbaijani family. He has studied in the
Qom Seminary under Sayyid
Hossein Borujerdi and
Mohaqeq Damad, as well as in the
Najaf Seminary under Sayyid
Abu al-Qasim al-Khoei, Sayyid
Muhsin al-Hakim, and Sayyid
Abd al-Hadi Shirazi. He currently resides and teaches in the seminary of Qom. He is a leading expert on the discipline of
Ilm ar-Rijal, which seeks to authentically and efficiently pass judgment on the reliability of narrators of
Hadith. He leads the prayers at the
Fatima Masumeh Shrine. His students include: Sayyid Muhammad-Kadhim al-Tabatabaei, Sayyid Abd al-Hadi al-Mas'udi, and Sayyid Adil al-Alawi. He led
Salat al-Janazah at the
funeral of Hussein-Ali Montazeri, the
deputy supreme leader of Iran in 2009. ==See also==