Who formed XXX?
Hanbali
a text with over 30,000 saying, actions and customs of Muhammad. Ibn Hanbal never composed an actual systematic legal theory on his own, though his followers established a systemic method after his death. Much of the work of preserving the school based on Ibn Hanbal's method was laid by his student Abu Bakr al-Khallal; his documentation on the founder's views eventually reached twenty volumes. The original copy of the work, which was contained in the House of Wisdom, was burned along with many other works of literature during the Mongol siege of Baghdad. The book was only preserved in a summarized form by the Hanbali jurist al-Khiraqi, who had access to written copies of al-Khallal's book before the siege. Relations with the Abbasid Caliphate were rocky for the Hanbalites. Led by the Hanbalite scholar Al-Hasan ibn 'Ali al-Barbahari, the school often formed mobs of followers in 10th-century Baghdad who would engage in violence against fellow Sunnis suspected of committing sins and all Shi'ites. During al-Barbahari's leadership of the school in Baghdad, shops were looted, female entertainers were attacked in the streets, popular grievances among the lower classes were agitated as a source of mobilization, and public chaos in general ensued. Their efforts would be their own undoing in 935, when a
Abu Bakr al-Khallal