Al-Fadl ibn al-Rabi (, 757/8<unk>823/4), aive mumwe wevakuru vane mukurumbira muAbbasid Caliphate munguva yekutonga kwaHarun al-Rashid () naAl-Amin (), waakashanda semukuru uye gurukota guru. Fadl akaita basa rinokosha somunhu mukuru akakurudzira hondo yevagari vemo yakatanga pashure porufu rwaHarun
, achitsigira al-Amin achipesana nehanzvadzi yake al-Ma'mun (). Pashure pokukunda kwaal-Ma'mun akaenda kunovanda, asi pakupedzisira akazviyananisa amene nomutongi mutsva.