Authentic
graded by Salim al-Hilali
Muwatta Malik 462
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى
Yahya related to me from Malik from Hisham ibn Urwa from his father from A'isha, the wife of the Prophet, mayAllah bless him and grant him peace, that the Prophet, may Allah bless him and grant him peace, saw spittle, or mucus or phlegm, on the wall of the qibla and scraped it off.
Reported by Malik (No. 462).