Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "Any group of people that assemble in one of the Houses of Allah to recite the Book of Allah, learning and teaching it, tranquility will descend upon them, mercy will engulf them, angels will surround them and Allah will make mention of them to those (the angels) in His proximity."[Muslim].
App reference: Book 9, Hadith 33
Arabic/English book reference: Book 9, Hadith 1023