Majma al-Zawaid — Hadith 16766

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: The Prophet (peace and blessings be upon him) passed by Sayyiduna Abdullah bin Rawahah (may Allah be pleased with him), who was making remembrance with his companions (that is, admonishing them). The Prophet (peace and blessings be upon him) said: "You are a group with whom Allah Almighty has commanded me to keep myself." Then the Prophet (peace and blessings be upon him) recited this verse: "And keep yourself patiently with those who call upon their Lord morning and evening", up to: "and whose affair has exceeded all bounds." (The Prophet (peace and blessings be upon him) said:) "As for the number of you sitting here, the same number of angels sit with such people. If they glorify Allah, the angels glorify Him too; if they praise Allah, the angels praise Him too; and if they declare the greatness of Allah, the angels declare His greatness too. Then those angels ascend to the presence of the Lord, and the Lord knows better than them. The angels say: 'O our Lord, Your servants were glorifying You, so we glorified You too; they were declaring Your greatness, so we declared Your greatness too; they were praising You, so we praised You too.' Then our Lord says: 'O My angels, I make you witnesses that I have forgiven them.' The angels say: 'Among them was such-and-such a sinful person.' Then Allah Almighty says: 'They (the people of remembrance) are such people that the one who sits with them is not left wretched (that is, deprived).'"
Tabarani recorded it in al-Mu'jam al-Saghir; its chain contains Muhammad bin Hammad al-Kufi, who is da'if (weak).