Workbook: al-Usul as-sittah (The 6 Fundamental Principles) Aqeedah, Knowledge, Manhaj, Muhammad Ibn AbdulWahhab, Workbooks 6 September 202222 September 2023 Abul Abbaas, Naveed Ayaaz 0 Comments The treatise “Six Fundamental Principles” authored by Muhammad Ibn AbdulWahhab, set out in a workbook format for students.