Pedzisa mutsara unotevera: Al-Fadl ibn al-Rabi (, 757/8<unk>823/4), aive mumwe wevakuru vane mukurumbira veAbbasid Caliphate mukutonga kwaHarun al-Rashid () uye al-Amin (), waakashanda semukuru uye gurukota guru. Fadl akaita basa rinokosha somunhu mukuru anokurudzira
hondo yevagari vemo yakatanga mushure mekufa kwaHarun, achitsigira al-Amin achipesana nehafu-mukoma wake al-Ma'mun (r. Pashure pokukunda kwaal-Ma'mun akaenda kunovanda, asi pakupedzisira akazviyananisa amene nomutongi mutsva.