Riyad as-Saliheen 1693
Anas bin Malik (May Allah be pleased with him) said:
The Messenger of Allah ﷺ said, "Spitting in the mosque is a sin, and its expiation is that the spittle should be buried in earth."
[Al-Bukhari and Muslim].
عن أنس رضي الله عنه أن رسول الله ﷺ :
"البصاق في المسجد خطيئة، وكفارتها دفنها" ((متفق عليه)).
Classification
Sahih (Authentic)
References
Riyad as-Saliheen 1693
Riyad as-Saliheen Book of Prohibited actions, Hadith 183