Sayyiduna Mu'awiyah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) came out to a group of companions who were sitting together, and he (peace and blessings be upon him) said: "What has brought you together?" They said: We are remembering Allah and the blessings He has bestowed upon us, and how He rescued us through them from the Jahiliyyah and its ignorance. He (peace and blessings be upon him) said: "By Allah, is that what has brought you together?" They said: Yes. He (peace and blessings be upon him) said: "By the One in whose Hand is my soul, if you are truthful, then Allah Almighty boasts about you before the angels."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16903