Grand Ayatollah Mousa Shubairi Zanjani (aka Mousa Shobeiri Zanjani Arabic: السید موسی الشبيري الزنجاني Persian: سید موسی شبیری زنجانی , born in 2 March 1928) is an Iranian TwelverShi'amarja. He was born in Qom, Iran. He has studied in the seminaries of Qom under Grand Ayatollah Borujerdi and Mohaqeq Damad. He currently resides and teaches in the Seminary of Qom, Iran. 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 in the Shrine of Masuma of Qom.