(15) باب الاِسْتِنْجَاءِ بِالْمَاءِ
Narrated Anas bin Malik:
Whenever Allah's Messenger (ﷺ) went to answer the call of nature, I along with another boy used to accompany him with a tumbler full of water. (Hisham commented, "So that he might wash his private parts with it.)" (JA)
Reference (JA): Sahih al-Bukhari 150 (JA)
In-book reference (JA): Book 4, Hadith 16 (JA)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 4, Hadith 152 (JA)