"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.'"  

شُكِيَ إِلَى النَّبِيِّ ﷺ الرَّجُلُ يَجِدُ الشَّىْءَ فِي الصَّلاَةِ فَقَالَ لاَ حَتَّى يَجِدَ رِيحًا أَوْ يَسْمَعَ صَوْتًا  

"The Prophet was asked about doubts (concerning ablution) during prayer. He said: 'he should not leave until he hears a sound or detects an odor.'"  

سُئِلَ النَّبِيُّ ﷺ عَنِ التَّشَبُّهِ فِي الصَّلاَةِ فَقَالَ لاَ يَنْصَرِفْ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا  

"The Messenger of Allah said: 'No ablution (is needed) unless there is an odor or a sound.'"  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ وُضُوءَ إِلاَّ مِنْ صَوْتٍ أَوْ رِيحٍ  

"I saw Sa'ib bin Yazid sniffing his garment, and I said: 'Why (are you doing) that?' He said: 'I heard the Messenger of Allah say: "No ablution (is needed) unless there is an odor or a sound."  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ لاَ وُضُوءَ إِلاَّ مِنْ رِيحٍ أَوْ سَمَاعٍ