[4] Ibn al-Mughallis was also a student of Muhammad bin Dawud al-Zahiri, whose body he ritually washed as part of the Islamic funeral rite.
[7][8] Ibn al-Mughallis later moved west, settling down in the Iberian Peninsula in what was then Islamic Spain.
While initially hesitant when asked to pray to God for the defeat of Banu Salama, he eventually relented after witnessing a particularly revolting act of injustice.
[14][15] According to Ibn al-Nadim, he was famous for writing a systematic refutation of the rival Shafi'ite school of law.
[9] Due to Ibn al-Mughallis' poor political and personal relations with Abbasid vizier Ali ibn Isa al-Jarrah, and Jarrah's strong relations with clerics of the Shafi'ite rite, the Zahirite school fell out of favor with the government in Baghdad.