(13) باب النَّهْىِ عَنِ الْبُصَاقِ، فِي الْمَسْجِدِ فِي الصَّلاَةِ وَغَيْرِهَا
Abdullah b. Shakhkhir reported on the authority of his father that he said:
I said prayer with the Messenger of Allah (ﷺ) and saw him spitting and rubbing it off with his shoe.
Reference: Sahih Muslim 554 a
In-book reference: Book 5, Hadith 72
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1127