It is narrated from Hazrat Antarah that he says: I asked Hazrat Ibn Abbas (may Allah be pleased with them), "Which deed is the best?" He (may Allah be pleased with him) replied: The remembrance of Allah is the greatest deed. No group of people sit together in a house to teach each other the Book of Allah except that the angels shade them with their wings, and as long as they are engaged in this act, they are guests of Allah. This continues until they become occupied with something else.