Mu'awiya ibn Qurra reported that his father said:

“I came to Allah’s Messenger (ﷺ) in a group of fewer than ten men from the Muzaina tribe, so that we might pay homage to him, and his shirt was set loose (or: “the button of his shirt was set loose”), so I inserted my hand in the breast of his shirt and I touched the Seal.”

حَدَّثَنَا أَبُو عَمَّارٍ الْحُسَيْنُ بْنُ حُرَيْثٍ، قَالَ‏:‏ حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ‏:‏ حَدَّثَنَا زُهَيْرٌ، عَنْ عُرْوَةَ بْنِ عَبْدِ اللهِ بْنِ قُشَيْرٍ، عَنْ مُعَاوِيَةَ بْنِ قُرَّةَ، عَنْ أَبِيهِ، قَالَ‏:‏ أَتَيْتُ رَسُولَ اللهِ صلى الله عليه وسلم فِي رَهْطٍ مِنْ مُزَيْنَةَ لِنُبَايِعَهُ، وَإِنَّ قَمِيصَهُ لَمُطْلَقٌ، أَوْ قَالَ‏:‏ زِرُّ قَمِيصِهِ مُطْلَقٌ قَالَ‏:‏ فَأَدْخَلْتُ يَدِي فِي جَيْبِ قَمِيصِهِ، فَمَسَسْتُ الْخَاتَمَ‏.‏