Abu Bakr Ibn Mujāhid

Abū Bakr Ibn Mujāhid (Arabic: ابن مجاهد) (Full name: أبو بكر أحمد بن موسى بن العباس بن مجاهد التميمي) (born 245AH/859-860CE in Baghdad and died 324AH/936CE) was a scholar of Islamic studies. He studied Qur'ān and Hadith in Baghdad. He was most notable for establishing the seven canonical Qur'anic readings (Qira'at). He was also notable for delivering the charge of heretical Qur'anic exegesis that reopened the trial of Mansur al-Hallaj, and ultimately led to his execution by the Abbasid Caliphate al-Muqtadir.

In addition to having established and delineated the canonical readings, Ibn Mujahid was also a student of Qunbul, one of the canonical readers.

...
Wikipedia