'Abbad bin Tamim narrated that his paternal uncle said:
"A complaint was made to the Prophet about a man who sensed something (some doubt about his ablution) during prayer. He said: 'No (he does not have to perform ablution) unless he notices a smell or hears a sound.'"

حَدَّثَنَا مُحَمَّدُ بْنُ الصَّبَّاحِ، قَالَ أَنْبَأَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنِ الزُّهْرِيِّ، عَنْ سَعِيدٍ، وَعَبَّادِ بْنِ تَمِيمٍ، عَنْ عَمِّهِ، قَالَ شُكِيَ إِلَى النَّبِيِّ ـ ﷺ ـ الرَّجُلُ يَجِدُ الشَّىْءَ فِي الصَّلاَةِ فَقَالَ " لاَ حَتَّى يَجِدَ رِيحًا أَوْ يَسْمَعَ صَوْتًا " .