Sahih al-Bukhari 176
Sahih al-Bukhari · Book 4: Ablutions (Wudu') · Whosoever considers not to repeat ablution except if something is discharged or passed from exit (front or back private parts)
Narrated Abu Huraira:
حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ ، قَالَ حَدَّثَنَا ابْنُ أَبِي ذِئْبٍ ، عَنْ سَعِيدٍ الْمَقْبُرِيِّ ، عَنْ أَبِي هُرَيْرَةَ ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " لاَ يَزَالُ الْعَبْدُ فِي صَلاَةٍ مَا كَانَ فِي الْمَسْجِدِ يَنْتَظِرُ الصَّلاَةَ، مَا لَمْ يُحْدِثْ " . فَقَالَ رَجُلٌ أَعْجَمِيٌّ مَا الْحَدَثُ يَا أَبَا هُرَيْرَةَ قَالَ الصَّوْتُ. يَعْنِي الضَّرْطَةَ .
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).