Sayyiduna Abu Mu'adh (may Allah be pleased with him) narrates that I heard Sayyiduna Anas (may Allah be pleased with him) saying that when the Messenger of Allah (peace and blessings be upon him) would go to relieve himself, I and another boy would follow him carrying a water vessel. Imam Abu Bakr (may Allah have mercy on him) says that this Abu Mu'adh is 'Ata bin Abi Maymunah.