The Messenger of Allah ﷺ said: If any one of you offers prayer and feels a movement between his paddocks, but is doubtful whether or not his ablution broke, he should not cease praying unless he hears a sound or perceives a smell. (Using translation from Abū Dāʾūd 177)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا وَجَدَ أَحَدُكُمْ فِي صَلَاتِهِ حَرَكَةً فِي دُبُرِهِ فَأَشْكَلَ عَلَيْهِ أَحْدَثَ أَوْ لَمْ يُحْدِثْ فَلَا يَنْصَرِفْ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا  

[Machine] "The Messenger of Allah ﷺ said: Verily, Satan comes to one of you while he is in prayer and takes a strand of hair from the back of his head and extends it, making him think that he has changed. He does not leave until he hears a sound or finds a scent."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِنَّ الشَّيْطَانَ يَأْتِي أَحَدَكُمْ وَهُوَ فِي صَلَاتِهِ فَيَأْخُذُ شَعْرَةً مِنْ دُبُرِهِ فَيَمُدُّهَا فَيَرَى أَنَّهُ قَدْ أَحْدَثَ فَلَا يَنْصَرِفَنَّ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا  

[Machine] The Messenger of Allah ﷺ said: "Verily, the Shaytan comes to one of you while he is praying and takes a strand of hair from the back of his head and stretches it out, and he sees that he has caused a disturbance. He does not leave until he hears a sound or finds a fragrance."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِنَّ الشَّيْطَانَ يَأْتِي أَحَدَكُمْ وَهُوَ فِي صَلَاتِهِ فَيَأْخُذُ شَعْرَةً مِنْ دُبُرِهِ فَيَمُدُّهَا فَيَرَى أَنَّهُ قَدْ أَحْدَثَ فَلَا يَنْصَرِفْ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا  

"إِنَّ الشَّيطَانَ لَيَأْتِى أَحَدَكُم، وَهُوَ في صَلاتهِ فَيَأخُذ بِشَعْرةٍ مِنْ دُبُرِه فَيَمُدُّهَا، فَيَرَى أنَّهُ أَحْدَثَ، فَلَا يَنْصَرِفْ حتَّى يَسْمَعَ صَوْتًا أوْ يَجِدَ رِيحًا".  

"مَنْ خُيِّلَ لَهُ في صَلاتِهِ أَنَّهُ قَدْ أَحْدَثَ فَلا يَنْصَرِفَنَّ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجدَ رِيحًا".