Sunan Abi Dawud 1455
سنن أبي داود#1455SahihAbu Hurairah reported the Prophet (ﷺ) as saying:No people get together in a house of the houses of Allah (i.e. a mosque), reciting the Book of Allah, and learning it together among themselves, but calmness (sakinah) comes down to them, (Divine) mercy covers them (from above), and the angels surround them, and Allah makes a mention of them among those who are with Him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (2699)
In-book reference: 8:40