Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “Verily, Allah Almighty has caravans of angels who have no other work but to follow gatherings of remembrance. When they find such gatherings in which there is remembrance, they sit with them and some of them surround the others with their wings until the space between them and the heavens is covered. When they disperse, they ascend to the heavens and Allah Almighty asks them, although He knows better than them:
From where have you come? They say: We came from Your servants on earth who were glorifying You, declaring Your greatness and oneness, praising You and asking from You. Allah says: What do they ask from Me? They say: They ask for Your Paradise. Allah says: Have they seen My Paradise? They say no. Allah says: What if they were to see My Paradise? They say: They seek Your protection. Allah says: From what do they seek My protection? They say: From Your Hellfire, our Lord. Allah says: Have they seen My Hellfire? They say no. Allah says: What if they were to see My Hellfire? They say: They ask for Your forgiveness. Allah says: I will pardon them, give them what they request, and grant them protection. They say: Our Lord, there is one among them, a simple servant who happened to pass by and sit there alongside them. Allah says: I will also grant him pardon, for whoever sits with these fellows will not suffer misery.”
Source: Ṣaḥīḥ al-Bukhārī 6408, Ṣaḥīḥ Muslim 2689