Angels of Dhikr

The World of Angels by Sheikh Abdul Hamid Kishk
p.74

"The Messenger of Allah (saw) went out to a circle of his Companions and said, 'What is it that has caused you to sit together?' They said, 'We sat down to remember Allah and praise Him for He has guided us to Islam and been gracious to us.' He said, 'By Allah, is that the only thing that made you sit together?' They said, 'By Allah, we sat down for that reason alone.' He said, 'I did not make you swear out of any suspicion of you, but Jibril came to me and reported to me that Allah Almighty is boasting about you to the angels.'"

"O you who believe, remember Allah repeatedly. And glorify Him both morning and evening. It is He who calls down blessing on you, as do His angels, to bring you out of darkness into the light and, to the believers, He is most merciful."

(Qur'an 33:41-43)