' Ali ibn al - Husayn ibn Quraysh ʿAli ibn al - Husayn ibn Quraysh ibn Shibl ( ) ( also known as al - Bukhari ) was a Muslim military commander who gained control of the Abbasid province of Fars in the mid - 860s . He ruled Fars until 869 , when he was defeated and captured by Ya ' qub ibn al - Layth , the Saffarid amir of Sistan . Career prior to 868 . A number of Muslim historian s , including al - Ya ' qubi and al - Tabari , wrote about ' Ali , but their accounts are not identical . According to al - Ya ' qubi . ' Ali first came to power in Fars in 863 , when the provincial army revolted under his leadership . Fars at the time was one of several provinces that had been assigned to the Tahirid family , who held the important governorships of Khurasan and Baghdad . In response to the revolt , the governor of Baghdad , Muhammad ibn ' Abdallah appointed his fellow Tahirid ' Abdallah ibn Ishaq as governor of Fars and sent him to pacify the province . When ' Abdallah arrived , ' Ali at first submitted to him and was assigned to fight against a group of Kharijites near the border with Kerman . Soon , however , the army became disgruntled with ' Abdallah , who refused to pay their salaries ; as a result , ' Ali was able to convince the troops to support him in a new uprising . ' Ali returned and attacked ' Abdallah , forced him to retreat and seized his possessions . The army of Fars then made ' Ali their amir . According to al - Tabari . Al - Tabari ' s chronicle notes that , in the year 864 , the army of Fars revolted against ' Abdallah ibn Ishaq , looted his residence and forced him to flee ; however it does not explicitly name ' Ali as being involved with this event . It does not mention ' Ali until the events of 868 and 869 , at which point he was serving as the caliphal governor of Fars ; it also describes ' Ali as having previously been in the service of the Tahirids . War with Ya ' qub ibn al - Layth . In 868 , war broke out between ' Ali and the amir of Sistan , Ya ' qub ibn al - Layth . According to al - Tabari , ' Ali had written to the caliph al - Mu ' tazz and requested that the governorship of Kerman be given to him . Kerman , like Fars , had been assigned to the Tahirids , but ' Ali claimed that Tahirid misrule had weakened their control over the province . According to the narrative , the central authorities did not trust him , but agreed to appoint him as governor of Kerman . At the same time , however , they also wrote to Ya ' qub and gave him the same appointment , in the hopes that the two amirs would fight against each other and that one of them would be defeated . Upon receiving his appointment , Ya ' qub departed from Sistan to Kerman with the intention of establishing his authority there , when ' Ali learned of Ya ' qub ' s advance , he dispatched an army under the command of Tawq ibn al - Mughallis to Kerman to defend the province . Tawq reached Kerman before Ya ' qub , and for a while the two sides avoided engaging each other . Eventually , however , Ya ' qub was able to defeat and capture Tawq . His victory allowed him to secure his hold over Kerman and it became another one of his provinces . When ' Ali learned about Tawq ' s defeat , he feared that Ya ' qub would press his advantage and invade Fars . He therefore mobilized his troops and set up his camp just outside Shiraz . When Ya ' qub entered Fars , he and his army advanced to Shiraz and lined up to face ' Ali ' s forces . According to the biographer Ibn Khallikan , the resulting battle took place on April 21 , 869 ; during the course of the fighting , Ya ' qub ' s army broke through the enemy ' s front line , and soon ' Ali ' s men were abandoning the field in a panic and retreating back into Shiraz . ' Ali was captured and brought before Ya ' qub , who ordered him bound and confiscated the possessions in his camp . Ya ' qub then entered Shiraz and allowed his troops to plunder the residences of ' Ali and his partisans . After remaining there for a short time , Ya ' qub abandoned Fars and returned to Sistan , and took with him ' Ali and a number of his commanders . Following Ya ' qub ' s departure , the central authorities sent al - Harith ibn Sima al - Sharabi to govern Fars . ' Ali ' s date of death is not mentioned by the sources . Ibn Khallikan , however , states that he was tortured on the orders of Ya ' qub to the point that he went insane , and was ultimately imprisoned in a fortress in Kerman .