Pedzisa mutsara unotevera: Abu l-Abbas al-Fadl ibn Sahl ibn Zadhanfarukh al-Sarakhsi (; akafa 818), ainzi Dhu 'l-Ri'āsatayn ("murume wemisoro miviri"), aive mukurumbira wePersian wezera reAbbasid muKhurasan, uyo akashanda pasi paCaliph al-Ma'mun (r. 813 <unk> 832). Akaita basa rinokosha muku
hondo yevagari vemo pakati pa al-Ma'mun nemukoma wake al-Amin (r. 809<unk>813), uye aiva mutevedzeri waAbbasid Caliphate kusvika muna 817.