Sahih Bukhari

Narrated Abu Huraira:Allah's Messenger (ﷺ) said, ""A person is considered in prayer as long as he is waiting for the prayer in the mosque as long as he does not do Hadath."" A non-Arab man asked, ""O Abu Huraira! What is Hadath?"" I replied, ""It is the passing of wind (from the anus) (that is one of the types of Hadath)