(22) باب فِي كَرَاهِيَةِ الْبُزَاقِ فِي الْمَسْجِدِ
Abu Hurairah reported:
The Messenger of Allah(ﷺ) said: if anyone enters the mosque, and spits in it, or ejects phlegm, he should remove some earth and bury it there. If he does not do so, then he should spit in his clothes and not come out with it.
Reference: Sunan Abi Dawud 477
In-book reference: Book 2, Hadith 87
English translation: Book 2, Hadith 477