عن عمرو بن سلمة قال فكنت أؤمّهم في بُردة موصلة فيها فتق فكنت إذا سجدت خرجت إستي
From ‘Amr ibn Salama who said: I used to lead people in prayer in a tattered garment with rips in it, and whenever I would prostrate, my anus would show.
Sunan Abi Dawud, The book of prayer