The Book of Prayers (Kitab Al-Salat) 
Muslim :: Book 4 : Hadith 1124
Anas b. Malik reported: The Messenger of Allah (may peace be upon him) said: Spitting in a mosque is a sin, and its expiation is that it should be buried.
The Book of Prayers (Kitab Al-Salat)
Muslim :: Book 4 : Hadith 1124
Anas b. Malik reported: The Messenger of Allah (may peace be upon him) said: Spitting in a mosque is a sin, and its expiation is that it should be buried.