Explanation of the Major Sins According to Islam by Muhammad Ibn Abd al-Wahhab. Posted on January 1, 2017 - الأحد 3 ربيع الثاني 1438November 6, 2021 by admin Explanation of the Major Sins According to Islam by Muhammad Ibn Abd al-Wahhab. Taught at Masjid Tawheed on Wednesdays between Magrhib and Ishaa by Abu Abdur-Rahman Samer. Posted in Classes and tagged wednesday-class.