Mu'tazili theology originated in the 8th century in al-Basrah when Wasil Ibn 'Ata' left the teaching lessons of Hasan al-Basri after a theological dispute.
Bâh' Sham'iyyah[REF] was a school of Mu'tazili thought, rivaling the school of Qadi Abd al-Jabbar, based primarily on the earlier teaching of Abu Hashim al-Jubba'i,[REF] the son of Abu 'Ali Muhammad al-Jubba'i.