The Messenger of Allah said: "The key to prayer is purification, its opening is to say Allahu Akbar and its closing is to say As-salamu 'alaikum." (Using translation from Ibn Mājah 276)   

عَنْ عَلِيٍّ ؓ رَفَعَهُ إِلَى النَّبِيِّ ﷺ قَالَ مِفْتَاحُ الصَّلَاةِ الطُّهُورُ وَإِحْرَامُهَا التَّكْبِيرُ وَإِحْلَالُهَا التَّسْلِيمُ  

[Machine] About the Prophet ﷺ , a man complained to him that he finds something in his prayer. He said, "Do not leave until you hear a sound or find a smell."  

عَنِ النَّبِيِّ ﷺ يَعْنِي شَكَا إِلَيْهِ رَجُلٌ يَجِدُ فِي صَلَاتِهِ شَيْئًا قَالَ لَا يَنْصَرِفُ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا  

[Machine] The Messenger of Allah ﷺ said: "If any of you experiences doubts during their prayer, whether something came out or not, they should not leave the prayer until they hear a sound or detect a scent."  

قَالَ رَسُولُ اللهِ ﷺ إِذَا أَشْكَلَ عَلَى أَحَدِكُمْ فِي صَلَاتِهِ خَرَجَ مِنْهُ شَيْءٌ أَوْ لَمْ يَخْرُجْ فَلَا يَنْفَتِلْ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا  

[Machine] The Messenger of Allah ﷺ said, "If one of you is in prayer and feels movement in his behind, whether intentional or unintentional, he should not leave his prayer until he hears a sound or finds a smell. This is evidence that he should leave if he hears a sound or finds a smell, there is no difference between whether it was deliberate, a mistake, or a previously passed wind. Allah knows best."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا كَانَ أَحَدُكُمْ فِي الصَّلَاةِ فَوَجَدَ حَرَكَةً فِي دُبُرِهِ أَحْدَثَ أَوْ لَمْ يُحَدِثْ فَأُشْكِلَ عَلَيْهِ فَلَا يَنْصَرِفْ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا وَفِي هَذَا دَلِيلٌ عَلَى أَنَّهُ يَنْصَرِفُ إِذَا سَمِعَ صَوْتًا أَوْ وَجَدَ رِيحًا لَا فَرْقَ فِيهِ بَيْنَ عَمْدِهِ وَسَهْوِهِ وَسَبْقِهِ وَاللهُ أَعْلَمُ  

[Machine] From the Prophet ﷺ , "Verily, the devil approaches one of you and taps on his ear, and he does not leave until he hears a sound, smells a scent, or intentionally does something."  

عَنِ النَّبِيِّ ﷺ إِنَّ الشَّيْطَانَ يَأْتِي أَحَدَكُمْ فَيَنْقُرُ عِنْدَ عِجَازِهِ فَلَا يَخْرُجَنَّ حَتَّى يَسْمَعَ صَوْتًا أَوْ يَجِدَ رِيحًا أَوْ يَفْعَلَ ذَلِكَ مُتَعَمِّدًا  

[Machine] The Messenger of Allah ﷺ said, "If one of you feels the need to pass gas while in prayer, he should put his hand on his nose and then leave to relieve himself. Then he should return and continue his prayer." This hadith was narrated by Hajjaj ibn Muhammad, from Ibn Juraij, from Hisham, from Amr ibn Ali al-Muqaddami, from Hisham, from Jubairah ibn al-Mughlis, from Abdullah ibn al-Mubarak, from Hisham. It was also narrated by Thawri, Shu'bah, Zaidah, Ibn al-Mubarak, Shu'ayb ibn Ishaq, and Abdah ibn Sulaiman, all from Hisham ibn Urwah, from his father, from the Prophet ﷺ as a marfu' (elevated) narration. Abu Isa at-Tirmidhi said, "This narration is more authentic than the hadith of Fadl ibn Musa."  

رَسُولَ اللهِ ﷺ قَالَ إِذَا أَحْدَثَ أَحَدُكُمْ وَهُوَ فِي الصَّلَاةِ فَلْيَضَعْ يَدَهُ عَلَى أَنْفِهِ ثُمَّ لِيَنْصَرِفْ تَابَعَهُ عَلَى وَصْلِهِ حَجَّاجُ بْنُ مُحَمَّدٍ عَنِ ابْنِ جُرَيْجٍ عَنْ هِشَامٍ وَعَمْرِو بْنِ عَلِيٍّ الْمُقَدَّمِيِّ عَنْ هِشَامٍ وَجُبَارَةَ بْنِ الْمُغَلِّسِ عَنْ عَبْدِ اللهِ بْنِ الْمُبَارَكِ عَنْ هِشَامٍ وَرَوَاهُ الثَّوْرِيُّ وَشُعْبَةُ وَزَائِدَةُ وَابْنُ الْمُبَارَكِ وَشُعَيْبُ بْنُ إِسْحَاقَ وعَبْدةُ بْنُ سُلَيْمَانَ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنِ النَّبِيِّ ﷺ مُرْسَلًا قَالَ أَبُو عِيسَى التِّرْمِذِيُّ وَهَذَا أَصَحُّ مِنْ حَدِيثِ الْفَضْلِ بْنِ مُوسَى  

[Machine] He said in its text: "If one of you speaks during prayer, he should cover his nose and then leave and perform ablution." Ali ibn Ahmad ibn Abdan informed us that Ahmad ibn Ubaid Al-Saffar narrated to us, Ubaid ibn Shareek narrated to us, Nuaim narrated to us, and Fadl ibn Musa mentioned it. We have also narrated it in the book of cleanliness from Abu Hurayrah, from the Messenger of Allah, ﷺ , that he said, "The prayer of one of you will not be accepted if he speaks until he performs ablution."  

أَنَّهُ قَالَ فِي مَتْنِهِ إِذَا أَحْدَثَ أَحَدُكُمْ فِي الصَّلَاةِ فَلْيَأْخُذْ عَلَى أَنْفِهِ وَلْيَنْصَرِفْ فَلْيَتَوَضَّأْ أَخْبَرَنَاهُ عَلِيُّ بْنُ أَحْمَدَ بْنِ عَبْدَانَ أنبأ أَحْمَدُ بْنُ عُبَيْدٍ الصَّفَّارُ ثنا عُبَيْدُ بْنُ شَرِيكٍ ثنا نُعَيْمٌ ثنا الْفَضْلُ بْنُ مُوسَى فَذَكَرَهُ وَقَدْ رُوِّينَا فِي كِتَابِ الطَّهَارَةِ عَنْ أَبِي هُرَيْرَةَ ؓ عَنْ رَسُولِ اللهِ ﷺ أَنَّهُ قَالَ لَا تُقْبَلُ صَلَاةُ أَحَدِكُمْ إِذَا أَحْدَثَ حَتَّى يَتَوَضَّأَ  

[Machine] He (the narrator) said: The Messenger of Allah ﷺ said, "There is no prayer without purification, and a charity (donation) from unlawful earnings is not accepted."  

أَنَّهُ قَالَ قَالَ رَسُولُ اللهِ ﷺ لَا صَلَاةَ بِغَيْرِ طَهُورٍ وَلَا تُقْبَلُ صَدَقَةٌ مِنْ غُلُولٍ  

[Machine] The Messenger of Allah, ﷺ , said: "If one of you becomes distracted during prayer, they should withdraw and perform ablution again and redo their prayer." This allows for the repetition of the prayer and it is also narrated by Al-Miswar ibn Makhrama from the companions.  

قَالَ رَسُولُ اللهِ ﷺ إِذَا فَسَا أَحَدُكُمْ فِي الصَّلَاةِ فَلْيَنْصَرِفْ فَلْيَتَوَضَّأْ وَلْيُعِدْ صَلَاتَهُ وَهَذَا يُصَرِّحُ بِإِعَادَةِ الصَّلَاةِ وَبِهِ قَالَ الْمِسْوَرُ بْنُ مَخْرَمَةَ مِنَ الصَّحَابَةِ