"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