Anas b. Malik reported:
While we were in the mosque with Allah's Messenger ( صلی اللہ علیہ وسلم ), a desert Arab came and stood up and began to urinate in the mosque. The Companions of Allah's Messenger ( صلی اللہ علیہ وسلم ) said: Stop, stop, but the Messenger of Allah ( صلی اللہ علیہ وسلم ) said: Don't interrupt him; leave him alone. They left him alone, and when he finished urinating, Allah's Messenger ( صلی اللہ علیہ وسلم ) called him and said to him: These mosques are not the places meant for urine and filth, but are only for the remembrance of Allah, prayer and the recitation of the Qur'an, or Allah's Messenger said something like that. He (the narrator) said that he (the Holy Prophet) then gave orders to one of the people who brought a bucket of water and poured It over.