Explanation of the Major Sins According to Islam by Muhammad Ibn Abd al-Wahhab. Posted on July 8, 2018 - الأحد 24 شوال 1439November 6, 2021 by admin Explanation of the Major Sins According to Islam by Muhammad Ibn Abd al-Wahhab. Taught at Masjid Tawheed on Tuesdays between Magrhib and Ishaa by Abu Abdur-Rahman Samer.