Pedzisa mutsara unotevera: Harthama ibn A'yan (; akafa June 816) aiva mukuru-akaberekerwa Khurasan uye gavhuna wekutanga weAbbasid Caliphate, achishanda pasi pe caliphs al-Hadi, Harun al-Rashid uye al-Ma'mun. Akaita basa rinokosha mukukunda kwaal-Ma'mun mu
Hondo yevagari vemo yeAbbasid, asi akaurayiwa paakarayira paakapikisa simba remhuri yeSahlid iyo yaitonga dare rake.