Ali ibn Ibrahim al-Qummi

Abū al-Ḥasan ʿAlī ibn Ibrāhīm al-Qummi, also known by his patronymic "Abu al-Hasan" or nickname "al-Shaykh al-Aqdam", was a 9th century Shia Muslim commentator and jurist who lived during the times of tenth and eleventh Shia Imams, Ali al-Hadi and Hasan al-Askari respectively.