Sahih al-Bukhari 407
Sahih al-Bukhari · Book 8: Prayers (Salat) · To scrape off the sputum from the mosque with the hand (using some tool or other, or using n tool)
Narrated `Aisha:
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ ، قَالَ أَخْبَرَنَا مَالِكٌ ، عَنْ هِشَامِ بْنِ عُرْوَةَ ، عَنْ أَبِيهِ ، عَنْ عَائِشَةَ أُمِّ الْمُؤْمِنِينَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم رَأَى فِي جِدَارِ الْقِبْلَةِ مُخَاطًا أَوْ بُصَاقًا أَوْ نُخَامَةً فَحَكَّهُ.
(the mother of faithful believers) Allah's Messenger (ﷺ) saw some nasal secretions, expectoration or sputum on the wall of the mosque in the direction of the Qibla and scraped it off.