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I prayed asr and maghrib today not knowing that there was a slit/hole in the crotch area of my pants no more than the size of half a finger nail. My front private part was exposed when I looked at this hole and stretched it to see if it was visible. But also it was covered with a long kurta shirt in prayer. I know it was not exposed to anyone for a fact and I know that one is not able to see it unless I lift my shirt. I only found out after but the fact that the hole is there and if one lifts under my shirt they can see it. Does it invalidate my salaah? The kurta shirt comes up to my knees and the hole can only be seen if one lifts my shirt and looks under the crotch area to see it.