كتاب الطهارة وسننها
1  
The Book of Purification and its Sunnah
(78)
Chapter: Ground that is soiled with urine and how it should be washed
(78)
باب الأَرْضُ يُصِيبُهَا الْبَوْلُ كَيْفَ تُغْسَلُ
Sunan Ibn Majah 528
It was narrated from Anas bin Malik that:
A Bedouin urinated in the mosque, and some of the people rushed at him. The Messenger of Allah said: "Do not interrupt him." Then he called for a bucket of water and poured it over (the urine).
حَدَّثَنَا أَحْمَدُ بْنُ عَبْدَةَ، أَنْبَأَنَا حَمَّادُ بْنُ زَيْدٍ، حَدَّثَنَا ثَابِتٌ، عَنْ أَنَسٍ، أَنَّ أَعْرَابِيًّا، بَالَ فِي الْمَسْجِدِ فَوَثَبَ إِلَيْهِ بَعْضُ الْقَوْمِ فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏ "‏ لاَ تُزْرِمُوهُ ‏"‏ ‏.‏ ثُمَّ دَعَا بِدَلْوٍ مِنْ مَاءٍ فَصَبَّ عَلَيْهِ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 528
In-book reference : Book 1, Hadith 262
English translation : Vol. 1, Book 1, Hadith 528