Mughirah bin Shu'bah (may Allah be pleased with him) says:
"One night I became a guest with Messenger of Allah ﷺ. At the time of meals a roasted side portion of meat was served. Messenger of Allah ﷺ cut pieces from it and gave me to eat. During this period Bilaal came and called out the adhaan. Messenger of Allah ﷺ said: 'May his both hands be in dust. What made him call out the adhaan now'. He put down the knife and went for salaah". Mughirah (may Allah be pleased with him) says "(Another thing that happened) that my moustache had grown long. Messenger of Allah ﷺ said: 'Come let me put a miswaak on it and trim it', or said, 'Put a miswaak on it and trim it'. (One of the narrators are in doubt as to which of the two Messenger of Allah ﷺ had said).

حَدَّثَنَا مَحْمُودُ بْنُ غَيْلانَ، قَالَ: حَدَّثَنَا وَكِيعٌ، قَالَ: حَدَّثَنَا مِسْعَرٌ، عَنْ أَبِي صَخْرَةَ جَامِعِ بْنِ شَدَّادٍ، عَنِ الْمُغِيرَةِ بْنِ عَبْدِ اللهِ، عَنِ الْمُغِيرَةِ بْنِ شُعْبَةَ، قَالَ: ضِفْتُ مَعَ رَسُولِ اللهِ ﷺ ذَاتَ لَيْلَةٍ، فَأُتِيَ بِجَنْبٍ مَشْوِيٍّ، ثُمَّ أَخَذَ الشَّفْرَةَ فَجَعَلَ يَحُزُّ، فَحَزَّ لِي بِهَا مِنْهُ، قَالَ: فَجَاءَ بِلالٌ يُؤْذِنُهُ بِالصَّلاةِ فَأَلْقَى الشَّفْرَةَ، فَقَالَ: مَا لَهُ تَرِبَتْ يَدَاهُ؟، قَالَ: وَكَانَ شَارِبُهُ قَدْ وَفَى، فَقَالَ لَهُ: أَقُصُّهُ لَكَ عَلَى سِوَاكٍ أَوْ قُصُّهُ عَلَى سِوَاكٍ.