Qumm's Revolt and Re-Conquest

Al-Baladhuri relates that the people of Qumm rebelled and withheld the land tax in the days of al-Ma'mun, and he sent Ali ibn Hisham al-Marwazi against them. In the days of al-Mu'tazz the city was taken by force by Musa ibn Bugha. ¹

Al-Baladhuri says that al-Ma'mun sent Ali ibn Hisham to Qumm, reinforced him with armies and ordered him to punish its people. He killed their leader Yahya ibn Imran, demolished the city wall and levelled it to the ground. He collected from them seven million dirhams and a fraction; before this they had complained of two million. ¹

The source says that they were demanded money in the caliphate of al-Mu'tazz. He sent Musa ibn Bugha, his agent over the mountain, who was fighting the Talibiyyun who had appeared in Tabaristan. The city was taken by force, many of its people were killed, and al-Mu'tazz ordered a number of its notables carried off. ¹

This report comes from a single source and needs an additional source.