The Prophet ﷺ said, "No group sits remembering Allah except that the angels surround them, mercy envelops them, tranquility descends upon them, and Allah mentions them among those who are with Him."
عن النبي ﷺ قال: لا يقعد قوم يذكرون الله عز وجل إلا حفتهم الملائكة وغشيتهم الرحمة ونزلت عليهم السكينة وذكرهم الله فيمن عنده.
Muslim narrated it in the Book of Remembrance and Supplication (2700:39) through several routes from Muhammad bin Jafar, who said, Shubah narrated to us, I heard Abu Ishaq narrating from Aghar Abu Muslim that he said, "I testify regarding Abu Hurairah and Abu Saeed Khudri that they both said," and he mentioned the hadith.