Pedzisa mutsara unotevera: Al-Abbas ibn Musa ibn Isa () (akafa 815) aiva nhengo duku yeumambo hweAbbasid. Akabata nzvimbo dzakasiyana-siyana mukupera kwezana remakore rechisere uye kutanga kwezana remakore rechipfumbamwe, uye akaita basa rinotsigira muzviitiko zve
Fitna yechina.