Friday Prayer
11/8. Chapter:
To clean the teeth with Siwak on Friday
وَقَالَ أَبُو سَعِيدٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَسْتَنُّ.And Abu Sa'id said that the Prophet ﷺ used to clean his teeth.
Sahih Bukhari
حَدَّثَنَا أَبُو مَعْمَرٍ، قَالَ حَدَّثَنَا عَبْدُ الْوَارِثِ، قَالَ حَدَّثَنَا شُعَيْبُ بْنُ الْحَبْحَابِ، حَدَّثَنَا أَنَسٌ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَكْثَرْتُ عَلَيْكُمْ فِي السِّوَاكِ ".
Narrated Anas: Allah's Messenger (ﷺ) said, "I have told you repeatedly to use the Siwak. (The Prophet (ﷺ) put emphasis on the use of the Siwak.)
Reference : Sahih al-Bukhari 888In-book reference : Book 11, Hadith 13USC-MSA web (English) reference : Vol. 2, Book 13, Hadith 13