أَخْبَرَنَا قُتَيْبَةُ، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ أُتِيَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِصَبِيٍّ فَبَالَ عَلَيْهِ فَدَعَا بِمَاءٍ فَأَتْبَعَهُ إِيَّاهُ ‏.‏

It was narrated that 'Aishah said: "A small boy was brought to the Messenger of Allah (PBUH) and he urinated on him, so he called for water and poured it on the place where the urine was." Translation Not Available

Book Ref: Sunan An Nisai Book 1 Hadith 304
Web Ref:  Sunan An Nisai Not Available