Abū Mūsā al-Ashʿarī

…of the Qurʾān and delegated Abū Mūsā al-Ashʿarī as his representative, while Muʿāwiyah sent ʿAmr ibn al-ʿĀṣ. By agreeing to arbitration, ʿAlī conceded to deal with Muʿāwiyah on equal terms, thus permitting him to challenge ʿAlī’s claim as leader of the Muslim community. This concession aroused the anger of a…