Sahih Muslim Book - 2, Hadith - 661

حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا عُمَرُ بْنُ يُونُسَ الْحَنَفِيُّ حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ حَدَّثَنَا إِسْحَاقُ بْنُ أَبِي طَلْحَةَ حَدَّثَنِي أَنَسُ بْنُ مَالِكٍ وَهُوَ عَمُّ إِسْحَاقَ قَالَ بَيْنَمَا نَحْنُ فِي الْمَسْجِدِ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذْ جَاءَ أَعْرَابِيٌّ فَقَامَ يَبُولُ فِي الْمَسْجِدِ فَقَالَ أَصْحَابُ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَهْ مَهْ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ لَا تُزْرِمُوهُ دَعُوهُ فَتَرَكُوهُ حَتَّى بَالَ ثُمَّ إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ دَعَاهُ فَقَالَ لَهُ إِنَّ هَذِهِ الْمَسَاجِدَ لَا تَصْلُحُ لِشَيْءٍ مِنْ هَذَا الْبَوْلِ وَلَا الْقَذَرِ إِنَّمَا هِيَ لِذِكْرِ اللَّهِ عَزَّ وَجَلَّ وَالصَّلَاةِ وَقِرَاءَةِ الْقُرْآنِ أَوْ كَمَا قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ فَأَمَرَ رَجُلًا مِنْ الْقَوْمِ فَجَاءَ بِدَلْوٍ مِنْ مَاءٍ فَشَنَّهُ عَلَيْهِ.

Anas bin Malik said: "While we were in the Masjid with the Messenger of Allah (s.a.w), a Bedouin came and stood and urinated in the Masjid. The Companions of the Messenger of Allah (s.a.w) said: 'Stop, stop!' The Messenger of Allah (s.a.w) said: 'Do not interrupt him; let him be.' So they left him alone until he had finished urinating. Then the Messenger of Allah (s.a.w) called him and said to him: 'These Masajid are not for any of this urine and filth; rather they are for the remembrance of Allah, the Mighty and Sublime, and Salat, and reading Qur'an,' or as the Messenger of Allah (s.a.w) said it. Then he ordered a man from the people to bring a bucket of water and pour it over it."