أَتَيْتُ النَّبِيَّ صلى الله عليه وسلم فَوَجَدْتُهُ يَسْتَنُّ بِسِوَاكٍ بِيَدِهِ يَقُولُ " أُعْ أُعْ "، وَالسِّوَاكُ فِي فِيهِ، كَأَنَّهُ يَتَهَوَّعُ.
Abu Musa al-Ash'ari reported: I came to the Prophet ﷺ and found him cleaning his teeth with a tooth-stick (siwak) in his hand. He was saying, “U', u',” with the tooth-stick in his mouth, as if he were retching.