عَنِ الْأَغَرِّ أَبِي مُسْلِمٍ قَالَ أَشْهَدُ عَلَى أَبِي هُرَيْرَةَ وَأَبِي سَعِيدٍ رَضِيَ اللَّهُ عَنْهُمَا أَنَّهُمَا شَهِدَا لِي عَلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ أَنَّهُ قَالَ وَأَنَا أَشْهَدُ عَلَيْهِمَا مَا قَعَدَ قَوْمٌ يَذْكُرُونَ اللَّهَ إِلَّا حَفَّتْ بِهِمُ الْمَلَائِكَةُ وَتَنَزَّلَتْ عَلَيْهِمُ السَّكِينَةُ وَتَغَشَّتْهُمُ الرَّحْمَةُ وَذَكَرَهُمُ اللَّهُ فِيمَنْ عِنْدَهُ
It is narrated from Abu Muslim Aghar, who says: I bear witness over Sayyiduna Abu Hurairah and Sayyiduna Abu Sa'id (may Allah be pleased with them both) that they bore witness over the Messenger of Allah (peace and blessings be upon him) that he said: When people sit together to remember Allah, the angels surround them, tranquility descends upon them, mercy covers them, and Allah mentions them before those who are with Him.