Hadith 1023
Abu Hurairah (May Allah be pleased with him) reported:
وعن أبي هريرة رضي الله عنه قال: قال رسول الله صلى الله عليه وسلم: "ما اجتمع قوم في بيت من بيوت الله يتلون كتاب الله، ويتدارسونه بينهم، إلا نزلت عليهم السكينة، وغشيتهم الرحمة، وحفتهم الملائكة، وذكرهم الله فيمن عنده" ((رواه مسلم)).
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].
In plain words
When people gather in a place of worship to recite, learn, and teach the Qur'an together, peace, mercy, and angels surround them, and Allah mentions them among those near Him.
Reference : Riyad as-Salihin 1023 In-book reference : Book 8, Hadith 33