صحیح ابن حبان
Ibn Hibban
كتاب الصلاة
Book of Prayer
باب المساجد - ذكر البيان بأن النخاعة في المسجد من مساوئ أعمال بني آدم في القيامة
Chapter on Mosques - Clarification that spitting in the mosque is among the evil deeds of mankind on Judgment Day.
1 hadith
Hadith 1640
Sayyiduna Abu Dharr Ghifari (may Allah be pleased with him) narrates this statement of the Prophet (peace and blessings be upon him): "All the good and bad deeds of my Ummah were presented before me, so among their good deeds I saw this: that filth which is removed from the path, and among their bad deeds I saw this: that spittle is thrown in the mosque and it is not buried."