It is disapproved for one to perform prayers when drowsy or needing to urinate or defecate. It is also disapproved for one to perform prayers while wearing tight socks that exert pressure on his feet. Apart from these instances, there are other disapproved acts mentioned in more detailed books. INSTANCES OF WHEN IT IS PERMITTED (JĀʾIZ) TO BREAK AN OBLIGATORY (WĀJIB) PRAYER THINGS THAT INVALIDATE (MUBṬILĀT) PRAYERS العربية فارسی اردو English Azərbaycan Türkçe Français