Sunan Ibn Majah
3791
Sahih+3

It was narrated that Abu Hurairah and Abu Sa'eed bore witness that the Prophet(ﷺ) said:"No people sit in a gathering remembering Allah, But the angels surround them, mercy covers them, tranquility descends upon them and Allah remembers them before those who are with Him

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi