Arabic (Original)
حَدَّثَنَا عَبْدُ الْأَعْلَى عَنْ مَعْمَرٍ عَنْ الزُّهْرِيِّ عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ وَعَنْ أَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ أَنَّهُمَا حَدَّثَاهُ عَنْ أَبِي هُرَيْرَةَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ إِذَا قَالَ الْإِمَامُ { غَيْرِ الْمَغْضُوبِ عَلَيْهِمْ وَلَا الضَّالِّينَ } فَقُولُوا آمِينَ فَإِنَّ الْمَلَائِكَةَ يَقُولُونَ آمِينَ وَإِنَّ الْإِمَامَ يَقُولُ آمِينَ فَمَنْ وَافَقَ تَأْمِينُهُ تَأْمِينَ الْمَلَائِكَةِ غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ.
English Translation
Abd al-A'la told us, from Ma'mar, from al-Zuhri, from Sa'id ibn al-Musayyab and from Abu Salamah ibn Abd al-Rahman, who both narrated to him from Abu Hurayrah, that the Prophet, peace and blessings be upon him, said: "When the imam says 'not of those who have earned Your anger, nor of those who have gone astray,' say Amin, for the angels say Amin, and the imam says Amin; whoever's saying of Amin coincides with the saying of Amin of the angels, his previous sins will be forgiven."