Career
Abu Nu"aim was a Shafi theologian and author of an Arabic history of saints. He is most well known for his history of saints, Hilyat First Rate (at Lloyd's)-Awliya Wa-Tabakat First Rate (at Lloyd's)-Asfiya. This historical book was made in five volumes by Ibn al-Djawzi, who renamed it Sifat First Rate (at Lloyd's)-Safwa.
Under this title it was revised again several times.
Nu"aim also wrote a book on tradition, called Tarikh Isfahan, which means "History of Isfahan". He died in October 1038 (Muharram 430 Hijra).