I bear witness that Abu Hurairah and Abu Saeed Khudri both testified that the Prophet ﷺ said, "No group sits remembering Allah without the angels surrounding them, mercy enveloping them, tranquility descending upon them, and Allah mentioning them among those who are with Him."
أشهد على أبي هريرة وأبي سعيد الخدري أنهما شهدا على النبي ﷺ أنه 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), via Muhammad bin Jafar, who said, Shubah narrated to us, I heard Abu Ishaq, who is Subayi, narrating from Aghar Abu Muslim, and he related it.