Narrated Anas bin Malik: Whenever Allah's Apostle 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.)"
Hadith Referenceصحيح البخاري / كتاب الوضوء / 150
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة