Abu Bakr Ibn Mujāhid

Abu Bakr Ahmad ibn Musa ibn al-Abbas ibn Mujahid al-Atashi was an Islamic scholar most notable for establishing and delineating the seven canonical Quranic readings (qira'at) in his work Kitāb al-sabʿa fī l-qirāʾāt. He was also notable for delivering the charge of heretical Quranic exegesis that reopened the trial of Mansur al-Hallaj, which ultimately led to his execution on the orders of the Abbasid caliph al-Muqtadir.