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.
suyuti:2267a

Messenger of Allah ﷺ said, "If any one of you says, "Amin" and the angels in the heavens say "Amin" and the former coincides with the latter, all his past sins will be forgiven." (Using translation from Bukhārī 781)   

السيوطي:٢٢٦٧a

"إذَا قال أحدُكُمْ في الصلاةِ: آمينَ، وقالت الملائكةُ في السماءِ: آمين، فوافقتْ إحْداهُما الأخرى غُفِرَ لَهُ ما تقدَّم مِنْ ذنبه".  

مالك، [خ] البخاري [م] مسلم [ن] النسائي عن أبي هريرة

See similar narrations below:

Collected by Bukhārī, Muslim, Nasāʾī, Mālik, Aḥmad, Nasāʾī's Kubrá
bukhari:781ʿAbdullāh b. Yūsuf > Mālik > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

Messenger of Allah ﷺ said, "If any one of you says, "Amin" and the angels in the heavens say "Amin" and the former coincides with the latter, all his past sins will be forgiven."  

البخاري:٧٨١حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ أَخْبَرَنَا مَالِكٌ عَنْ أَبِي الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ ؓ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا قَالَ أَحَدُكُمْ آمِينَ وَقَالَتِ الْمَلاَئِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَتْ إِحْدَاهُمَا الأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

muslim:410cḤarmalah b. Yaḥyá > Ibn Wahb > ʿAmr > Abū Yūnus > Abū Hurayrah

The Messenger of Allah ﷺ said: When anyone amongst you utters Amin in prayer and the angels in the sky also utter Amin, and this (utterance of the one) synchronises with (that of) the other, all his previous sins are pardoned.  

مسلم:٤١٠cحَدَّثَنِي حَرْمَلَةُ بْنُ يَحْيَى حَدَّثَنِي ابْنُ وَهْبٍ أَخْبَرَنِي عَمْرٌو أَنَّ أَبَا يُونُسَ حَدَّثَهُ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا قَالَ أَحَدُكُمْ فِي الصَّلاَةِ آمِينَ وَالْمَلاَئِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَ إِحْدَاهُمَا الأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

muslim:410dʿAbdullāh b. Maslamah al-Qaʿnabī > al-Mughīrah > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

The Messenger of Allah ﷺ said: When anyone amongst you utters Amin and the angels In the heaven also utter Amin and (the Amin) of the one synchronises with (that of) the other, all his previous sins are pardoned.  

مسلم:٤١٠dحَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ الْقَعْنَبِيُّ حَدَّثَنَا الْمُغِيرَةُ عَنْ أَبِي الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ قَالَ

قَالَ رَسُولُ اللَّهِ ﷺ إِذَا قَالَ أَحَدُكُمْ آمِينَ وَالْمَلاَئِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَتْ إِحْدَاهُمَا الأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

nasai:930Qutaybah > Mālik > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

The Messenger of Allah ﷺ said: "If any one of you says: 'Amin' and the angels in Heaven say Amin, and the one coincides with the other, his previous sins will be forgiven."  

النسائي:٩٣٠أَخْبَرَنَا قُتَيْبَةُ عَنْ مَالِكٍ عَنْ أَبِي الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا قَالَ أَحَدُكُمْ آمِينَ وَقَالَتِ الْمَلاَئِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَتْ إِحْدَاهُمَا الأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

malik:3-49Mālik > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

Yahya related to me from Malik from Abu'z Zinad from al-Araj from Abu Hurayra that the Messenger of Allah ﷺ said, "When one of you says 'Amin' and the angels in the sky say 'Amin' so that one coincides with the other, his previous wrong actions are forgiven him."  

مالك:٣-٤٩وَحَدَّثَنِي عَنْ مَالِكٍ عَنْ أَبِي الزِّنَادِ عَنِ الأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا قَالَ أَحَدُكُمْ آمِينَ وَقَالَتِ الْمَلاَئِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَتْ إِحْدَاهُمَا الأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

ahmad:9924ʿAbd al-Raḥman Mālik > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

The Messenger of Allah ﷺ said: "If any one of you says: 'Amin' and the angels in Heaven say Amin, and the one coincides with the other, his previous sins will be forgiven." (Using translation from Nasāʾī 930)  

أحمد:٩٩٢٤قَرَأْتُ عَلَى عَبْدِ الرَّحْمَنِ مَالِكٌ عَنْ أَبِي الزِّنَادِ عَنِ الْأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا قَالَ أَحَدُكُمْآمِينَ قَالَتِ الْمَلَائِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَتْ إِحْدَاهُمَا الْأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

ahmad:8122

The Messenger of Allah ﷺ said: When anyone amongst you utters Amin in prayer and the angels in the sky also utter Amin, and this (utterance of the one) synchronises with (that of) the other, all his previous sins are pardoned. (Using translation from Muslim 410c)  

أحمد:٨١٢٢

وَقَالَ رَسُولُ اللهِ ﷺ إِذَا قَالَ أَحَدُكُمْ آمِينَ وَالْمَلَائِكَةُ فِي السَّمَاءِ فَيُوَافِقُ إِحْدَاهُمَا الْأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ  

nasai-kubra:1004Qutaybah b. Saʿīd > Mālik > Abū al-Zinād > al-Aʿraj > Abū Hurayrah

Messenger of Allah ﷺ said, "If any one of you says, "Amin" and the angels in the heavens say "Amin" and the former coincides with the latter, all his past sins will be forgiven." (Using translation from Bukhārī 781)  

الكبرى للنسائي:١٠٠٤أَخْبَرَنَا قُتَيْبَةُ بْنُ سَعِيدٍ عَنْ مَالِكٍ عَنْ أَبِي الزِّنَادِ عَنِ الْأَعْرَجِ عَنْ أَبِي هُرَيْرَةَ

أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا قَالَ أَحَدُكُمْ آمِينَ وَقَالَتِ الْمَلَائِكَةُ فِي السَّمَاءِ آمِينَ فَوَافَقَتْ إِحْدَاهُمَا الْأُخْرَى غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ