A highly beneficial class that took place with Ustādh Amjad Rafīq in 2014/2015. Al-Qawāʾid al-Arbaʿ (The Four Principles) is the outstanding treatise by the illustrious Imām, Muḥammad ibn ʿAbd al-Wahhāb (raḥimahullāh). The noble brother utilised the explanation of six scholars in a weekly lesson that took place at TROID (online) over approximately half a year.