Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: “Apart from the angels who record people’s deeds, there are other angels who roam the earth in search of the people of dhikr (remembrance of Allah). When they find a group of people engaged in dhikr, they call out to each other in a loud voice: ‘Come to what you seek!’ So they come and surround them up to the lowest heaven. (When these angels return,) Allah Almighty asks: ‘When you left My servants, what were they doing?’ They say: ‘When we left them, they were praising You, declaring Your greatness, and remembering You.’ (For ease, the conversation between Allah Almighty and the angels is presented in dialogue form):

Allah Almighty: Have they seen Me?
The angels: No.
Allah Almighty: If they were to see Me, (what would their behavior be)?
The angels: If they were to see You, they would be even more devoted and steadfast in praising, glorifying, and remembering You.
Allah Almighty: What is it that they are seeking?
The angels: They are asking for Paradise.
Allah Almighty: Have they seen Paradise?
The angels: No.
Allah Almighty: If they were to see Paradise?
The angels: If they were to see it, their eagerness and desire for it would increase.
Allah Almighty: From what are they seeking refuge?
The angels: From the Fire.
Allah Almighty: Have they seen the Fire?
The angels: No.
Allah Almighty: If they were to see the Fire?
The angels: If they were to see it, they would flee from it even more and would be even more fearful of it.
Allah Almighty: (O angels!) I make you witnesses that I have forgiven them.
The angels: Among them is so-and-so, who is a sinner; he only came for some need, and his intention was not to sit with them (so how has he been forgiven)?
Allah Almighty: They are such a people that even their companion is not deprived (of mercy).”

Abu Huraira (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: "No people sit in a gathering in which they remember Allah Almighty except that the angels surround them, mercy covers them, tranquility descends upon them, and Allah Almighty mentions them among those who are with Him."

Sayyiduna Anas (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Whenever people sit together to remember Allah Almighty, a caller calls out to them from the heavens: 'Stand up, you have been forgiven, and your bad deeds have been turned into good deeds.'"