You searched for: Language Arabic. Remove constraint Language: Arabic. Personal Name Nasafī, ʻUmar ibn Muḥammad, Remove constraint Personal Name: Nasafī, ʻUmar ibn Muḥammad, Relation http://hdl.library.upenn.edu/1017.12/366295 Remove constraint Relation: http://hdl.library.upenn.edu/1017.12/366295 Subject 20th century. Remove constraint Subject: 20th century. Subject Islam -- Doctrines -- Early works to 1800. Remove constraint Subject: Islam -- Doctrines -- Early works to 1800.