Shortly after al-Mu'tasim's accession in August 833, Ishaq was appointed as governor of the Jibal and was ordered to deal with the Khurramites of that region, who had assembled in the district of Hamadhan and defeated a previous army sent against them.
In 838 Ishaq supervised the execution of 'Abdallah, the brother of the defeated Khurramite rebel Babak al-Khurrami, and gibbeted his corpse in Baghdad [REF].