Sahih Muslim 1226

A'isha reported: The Apostle of Allah (may, peace be upon him) saw spittle or snot or sputum, sticking to the wall towards Qibla and scratched it off. ..

Abu Huraira reported that the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) saw some sputum in the direction of the Qibla of the mosque. He turned towards people and said: How Is it that someone amongst you stands before his Lord and then spits..

Abu Huraira reported: I perceive as if I am looking at the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) folding up a part of his cloth with another one. ..

Anas b. Malik reported: The Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) said: When any one of you is engaged in prayer, he is holding intimate conversation with his Lord, so none of you must spit in front of him, or towards his right side, but..

Anas b. Malik reported: The Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) said: Spitting in a mosque is a sin, and its expiation is that it should be buried. ..

Shu'ba reported: I asked Qatada about spitting, in the mosque. He said: I heard Anas b. Malik say: I heard the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) say: Spitting in the mosque is a sin, and its expiation is that it should be buried. ..