سنن النسائي

It was narrated that Abu Sa'eed Al-Khudri said: "Mu'awiyah, (may Allah be pleased with him,) said: 'The Messenger of Allah (ﷺ) [SAW] went out to a circle - meaning, of his Companions - and said: 'What are you doing?' They said: 'We have come together to pray to Allah and praise Him for guiding us to His religion, and blessing us with you.' He said: 'I ask you, by Allah, is that the only reason?' They said: 'By Allah, we have not come together for any other reason.' He said: 'I am not asking you to swear to an oath because of any suspicion; rather Jibril came to me and told me that Allah, the Mighty and Sublime, is boasting of you to the angels.'"