(22) باب فِي كَرَاهِيَةِ الْبُزَاقِ فِي الْمَسْجِدِ
Anas reported:
The Messenger of Allah (ﷺ) said: Spitting in the mosque is a sin and it is expiated by burying the spittle.
Reference: Sunan Abi Dawud 475
In-book reference: Book 2, Hadith 85
English translation: Book 2, Hadith 475