Al-Fadl ibn Sahl
| Al-Fadl ibn Sahl | |
|---|---|
| Born | c. 770 Khurasan, Abbasid Caliphate | 
| Died | 13 February 818 | 
| Occupation(s) | Abbasid vizier and official | 
| Years active | c. 813 – 817 | 
| Era | Abbasid | 
| Father | Sahl | 
| Relatives | Hasan (brother) Buran (niece) | 
Abu l-Abbas al-Fadl ibn Sahl ibn Zadhanfarukh al-Sarakhsi (Arabic: أبو العباس الفضل بن سهل بن زادانفروخ السرخسي, romanized: Abu’l-ʿAbbās al-Faḍl ibn Sahl ibn Zādānfarrūkh as-Sarakhsī; died 818), titled Dhu 'l-Ri'āsatayn (Arabic: ذُو الرَّياسَتَيْن, "the man of the two headships"), was a famous Persian vizier of the Abbasid era in Khurasan, who served under Caliph al-Ma'mun (r. 813–832). He played a crucial role in the civil war between al-Ma'mun and his brother al-Amin (r. 809–813), and was the vizier of the Abbasid Caliphate until 817.