مَا اجْتَمَعَ قَوْمٌ فِي بَيْتٍ مِنْ بُيُوتِ اللَّهِ، يَتْلُونَ كِتَابَ اللَّهِ، وَيَتَدَارَسُونَهُ بَيْنَهُمْ، إِلَّا نَزَلَتْ عَلَيْهِمُ السَّكِينَةُ، وَغَشِيَتْهُمُ الرَّحْمَةُ، وَحَفَّتْهُمُ الْمَلَائِكَةُ، وَذَكَرَهُمُ اللَّهُ فِيمَنْ عِنْدَهُ
No group of people gather in a house of Allah, reciting the Book of Allah and studying it among themselves, except that tranquility descends upon them, mercy covers them, angels surround them, and Allah mentions them to those who are with Him.
Abu Hurairah•Sahih Muslim•Knowledge