Mu’awiyah reported: The Messenger of Allah, peace and blessings be upon him, came out to a gathering of his companions and he said, “Why are you sitting?” They said, “We are sitting to remember Allah and to praise him for guiding us to Islam and blessing us with it.” The Prophet said, “Only for Allah are you sitting for this?” They said, “By Allah, we are only sitting for this.” The Prophet said, “Verily, I did not ask you for an oath because I doubted you. Rather, Gabriel has told me that Allah Almighty is proud of you in front of the angels.”
Source: Ṣaḥīḥ Muslim 2701
Grade: Sahih (authentic) according to Muslim
عن معاوية رضي الله عنه قال إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَرَجَ عَلَى حَلْقَةٍ مِنْ أَصْحَابِهِ فَقَالَ مَا أَجْلَسَكُمْ قَالُوا جَلَسْنَا نَذْكُرُ اللَّهَ وَنَحْمَدُهُ عَلَى مَا هَدَانَا لِلْإِسْلَامِ وَمَنَّ بِهِ عَلَيْنَا قَالَ آللَّهِ مَا أَجْلَسَكُمْ إِلَّا ذَاكَ قَالُوا وَاللَّهِ مَا أَجْلَسَنَا إِلَّا ذَاكَ قَالَ أَمَا إِنِّي لَمْ أَسْتَحْلِفْكُمْ تُهْمَةً لَكُمْ وَلَكِنَّهُ أَتَانِي جِبْرِيلُ فَأَخْبَرَنِي أَنَّ اللَّهَ عَزَّ وَجَلَّ يُبَاهِي بِكُمْ الْمَلَائِكَةَ
2701 صحيح مسلم كتاب الذكر والدعاء والتوبة والاستغفار باب فضل الاجتماع على تلاوة القرآن وعلى الذكر