It was narrated from Al-Mughirah bin Shu'bah that the Messenger of Allah (ﷺ) went out to relieve himself, and Al-Mughirah followed him, (carrying) a vessel of water. He poured water for him when he had finished relieving himself, and he performed Wudu' and wiped over his Khuffs. (ES)
Arabic/English book reference (ES): Vol. 1, Book 1, Hadith 124 (ES)