Prohibition of Spitting in the Mosque

Imam Al-Nawawi’s Riyad-us-Saliheen
Chapter 309
Prohibition of Spitting in the Mosque

1693. Anas bin Malik (May Allah be pleased with him) said: The Messenger of Allah (sallallaahu ’alayhi wa sallam) said, “Spitting in the mosque is a sin, and its expiation is that the spittle should be buried in earth.”
[Al-Bukhari and Muslim].

1694. `Aishah (May Allah be pleased with her) said: The Messenger of Allah (sallallaahu ’alayhi wa sallam) saw spittle or snot or sputum, sticking to the wall towards Qiblah and scratched it off.
[Al-Bukhari and Muslim].

1695. Anas (May Allah be pleased with him) said: The Messenger of Allah (sallallaahu ’alayhi wa sallam) said, “It is not proper to use the mosque for urinating or easing oneself. They are merely built for the remembrance of Allah and the recitation of the Qur’an”, or as he stated.
[Muslim].