Whenever the Prophet (ﷺ) went for answering the call of nature, I and another boy used to go after him with a staff, a stick or a short spear (or stick) and a tumbler of water and when he finished from answering the call of nature we would hand that tumbler of water to him.
Reference: Sahih al-Bukhari 500 In-book : Book 8, Hadith 147 USC-MSA web (English) : Vol. 1, Book 9, Hadith 479 (deprecated)
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