“وَعَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ مَا جَلَسَ قَوْمٌ مَجْلِسًا, يَذْكُرُونَ اَللَّهَ إِلَّا حَفَّتْ بِهِمُ الْمَلَائِكَةُ, وَغَشِيَتْهُمُ الرَّحْمَةُ, وَذَكَرَهُمُ اللَّهُ فِيمَنْ عِنْدَهُ } أَخْرَجَهُ مُسْلِم ٌ [1]‏ .‏”

Abu Hurairah (radhiyallaahu anhu) narrated that the Messenger of Allah (ﷺ) said:
“People will not sit in an assembly in which they remember Allah without the angels surrounding them, mercy covering them, and Allah mentioning them among those who are with Him.”
[Related by Muslim]
[Bulugh al-Maram – Arabic/English book reference: Book 16, Hadith 1583]