Sahih al-Bukhari, Hadith 5468 ⓘ
Narrated `Aisha: A boy was brought to the Prophet to do Tahnik for him, but the boy urinated on him, whereupon the Prophet had water poured on the place of urine.
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ أُتِيَ النَّبِيُّ صلى الله عليه وسلم بِصَبِيٍّ يُحَنِّكُهُ، فَبَالَ عَلَيْهِ، فَأَتْبَعَهُ الْمَاءَ.
also referenced under: Book 71, Hadith 2 (In-Book) & Volume 7, Book 66, Hadith 377 (USC-MSA)