Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
muslim:228ʿAbd b. Ḥumayd And Ḥajjāj b. al-Shāʿir > Abū al-Walīd > ʿAbd > Abū al-Walīd > Isḥāq b. Saʿīd b. ʿAmr b. Saʿīd b. al-ʿĀṣ from my father from his father

I was with Uthman, and he called for ablution water and said: I heard Messenger of Allah ﷺ say: When the time for a prescribed prayer comes, if any Muslim performs ablution well and offers his prayer with humility and bowing, it will be an expiation for his past sins, so long as he has not committed a major sin; and this applies for all times.  

مسلم:٢٢٨حَدَّثَنَا عَبْدُ بْنُ حُمَيْدٍ وَحَجَّاجُ بْنُ الشَّاعِرِ كِلاَهُمَا عَنْ أَبِي الْوَلِيدِ قَالَ عَبْدٌ حَدَّثَنِي أَبُو الْوَلِيدِ حَدَّثَنَا إِسْحَاقُ بْنُ سَعِيدِ بْنِ عَمْرِو بْنِ سَعِيدِ بْنِ الْعَاصِ حَدَّثَنِي أَبِي عَنْ أَبِيهِ قَالَ كُنْتُ عِنْدَ عُثْمَانَ فَدَعَا بِطَهُورٍ فَقَالَ

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ مَا مِنِ امْرِئٍ مُسْلِمٍ تَحْضُرُهُ صَلاَةٌ مَكْتُوبَةٌ فَيُحْسِنُ وُضُوءَهَا وَخُشُوعَهَا وَرُكُوعَهَا إِلاَّ كَانَتْ كَفَّارَةً لِمَا قَبْلَهَا مِنَ الذُّنُوبِ مَا لَمْ يُؤْتِ كَبِيرَةً وَذَلِكَ الدَّهْرَ كُلَّهُ  


See similar narrations below:

Collected by Ibn Ḥibbān, Bayhaqī, Suyūṭī

ذِكْرُ الْبَيَانِ بِأَنَّ اللَّهَ جَلَّ وَعَلَا إِنَّمَا يَغْفِرُ ذُنُوبَ الْمُتَوَضِّئِ الَّتِي ذَكَرْنَاهَا إِذَا كَانَ مُجْتَنِبًا لِلْكَبَائِرِ دُونَ مَنْ لَمْ يَجْتَنِبْهَا

ibnhibban:1044Abū Khalīfah > Abū al-Walīd al-Ṭayālisī Hishām b. ʿAbd al-Malik > Isḥāq b. Saʿīd b. ʿAmr b. Saʿīd b. al-ʿĀṣ from my father from his father

I was with Uthman, and he called for ablution water and said: I heard Messenger of Allah ﷺ say: When the time for a prescribed prayer comes, if any Muslim performs ablution well and offers his prayer with humility and bowing, it will be an expiation for his past sins, so long as he has not committed a major sin; and this applies for all times. (Using translation from Muslim 228)  

ابن حبّان:١٠٤٤أَخْبَرَنَا أَبُو خَلِيفَةَ حَدَّثَنَا أَبُو الْوَلِيدِ الطَّيَالِسِيُّ هِشَامُ بْنُ عَبْدِ الْمَلِكِ حَدَّثَنَا إِسْحَاقُ بْنُ سَعِيدِ بْنِ عَمْرِو بْنِ سَعِيدِ بْنِ الْعَاصِ حَدَّثَنِي أَبِي عَنْ أَبِيهِ قَالَ كُنْتُ مَعَ عُثْمَانَ بْنِ عَفَّانَ فَدَعَا بِطَهُورٍ فَقَالَ

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ «مَا مِنِ امْرِئٍ مُسْلِمٍ تَحْضُرُهُ الصَّلَاةُ الْمَكْتُوبَةُ فَيُحْسِنُ وُضُوءَهَا وَرُكُوعَهَا وَخُشُوعَهَا إِلَّا كَانَتْ كَفَّارَةً لِمَا قَبْلَهَا مِنَ الذُّنُوبِ مَا لَمْ يَأْتِ كَبِيرَةً وَذَلِكَ الدَّهْرَ كُلَّهُ»  

bayhaqi:3582Abū ʿAbdullāh Muḥammad b. ʿAbdullāh al-Ḥāfiẓ > Abū ʿAbdullāh Muḥammad b. Yaʿqūb > Yaḥyá b. Muḥammad b. Yaḥyá > Abū al-Walīd > Isḥāq b. Saʿīd b. ʿAmr b. Saʿīd b. al-ʿĀṣ from my father from his father

I was with Uthman, and he called for ablution water and said: I heard Messenger of Allah ﷺ say: When the time for a prescribed prayer comes, if any Muslim performs ablution well and offers his prayer with humility and bowing, it will be an expiation for his past sins, so long as he has not committed a major sin; and this applies for all times. (Using translation from Muslim 228)   

البيهقي:٣٥٨٢أَخْبَرَنَا أَبُو عَبْدِ اللهِ مُحَمَّدُ بْنُ عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو عَبْدِ اللهِ مُحَمَّدُ بْنُ يَعْقُوبَ أنبأ يَحْيَى بْنُ مُحَمَّدِ بْنِ يَحْيَى ثنا أَبُو الْوَلِيدِ ثنا إِسْحَاقُ بْنُ سَعِيدِ بْنِ عَمْرِو بْنِ سَعِيدِ بْنِ الْعَاصِ قَالَ حَدَّثَنِي أَبِي عَنْ أَبِيهِ قَالَ كُنْتُ عِنْدَ عُثْمَانَ فَدَعَا بِطَهُورِهِ فَقَالَ

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ مَا مِنِ امْرِئٍ مُسْلِمٍ تَحْضُرُهُ صَلَاةٌ مَكْتُوبَةٌ فَيُحْسِنُ وَضُوءَهَا وَخُشُوعَهَا وَرُكُوعَهَا إِلَّا كَانَتْ كَفَّارَةً لِمَا قَبْلَهَا مِنَ الذُّنُوبِ مَا لَمْ يُؤْتِ كَبِيرَةً وَذَلِكَ الدَّهْرَ كُلَّهُ  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ حَجَّاجِ بْنِ الشَّاعِرِ وَغَيْرِهِ عَنْ أَبِي الْوَلِيدِ
bayhaqi:20757Abū al-Ḥasan b. ʿAbdān > Aḥmad b. ʿUbayd al-Ṣaffār > al-ʿAbbās b. al-Faḍl And ʾAbū Bakr al-Ṭayālisī Muḥammad b. Ibrāhīm > Ibrāhīm > Abū al-Walīd > Isḥāq b. Saʿīd / Ibn ʿAmr b. Saʿīd b. al-ʿĀṣ from my father from his father > Kunt

[Machine] I witnessed the Messenger of Allah ﷺ say, "There is no Muslim who attends a prescribed prayer and performs its ablution, bowing, and prostration well, except that it will be an expiation for what has passed of sins, as long as they were not major sins, and this applies for their entire lifetime."  

البيهقي:٢٠٧٥٧أَخْبَرَنَا أَبُو الْحَسَنِ بْنُ عَبْدَانَ أنبأ أَحْمَدُ بْنُ عُبَيْدٍ الصَّفَّارُ ثنا الْعَبَّاسُ بْنُ الْفَضْلِ وَأَبُو بَكْرٍ الطَّيَالِسِيُّ مُحَمَّدُ بْنُ إِبْرَاهِيمَ قَالَا ثنا إِبْرَاهِيمُ قَالَا ثنا أَبُو الْوَلِيدِ ثنا إِسْحَاقُ بْنُ سَعِيدٍ يَعْنِي ابْنَ عَمْرِو بْنِ سَعِيدِ بْنِ الْعَاصِ قَالَ حَدَّثَنِي أَبِي عَنْ أَبِيهِ قَالَ كُنْتُ عِنْدَ عُثْمَانَ بْنِ عَفَّانَ ؓ فَدَعَا بِطَهُورٍ فَقَالَ

شَهِدْتُ رَسُولَ اللهِ ﷺ يَقُولُ مَا مِنْ مُسْلِمٍ تَحْضُرُهُ صَلَاةٌ مَكْتُوبَةٌ فَيُحْسِنُ وُضُوءَهَا وَرُكُوعَهَا وَسُجُودَهَا إِلَّا كَانَتْ لَهُ كَفَّارَةً لِمَا مَضَى مِنَ الذُّنُوبِ مَا لَمْ يَأْتِ كَبِيرَةً وَهَذَا الدَّهْرَ كُلَّهُ  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ عَبْدِ بْنِ حُمَيْدٍ وَغَيْرِهِ عَنْ أَبِي الْوَلِيدِ
suyuti:19235a
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السيوطي:١٩٢٣٥a

"مَا مِن امْرِئ مُسْلِمٍ تَحْضُرُه صَلاةٌ مَكْتُوبَةٌ فَيُحْسِنُ وُضُوءَهَا وَخُشُوعَهَا وَرُكُوعَها إلا كَانت كفَّارَةً لمَّا قَبْلَهَا من الذُّنُوب مَا لَمْ تُؤْتَ كَبيرَةٌ، وَذَلك الدِّهْرَ كُلَّه".  

[م] مسلم [حب] ابن حبّان عن عثمان