Abu Samh said:
"I used to serve the Prophet, and when he wanted to take a bath he would say: 'Turn your back to me.' So I would turn my back and hung up a cloth, and concealed him with it." (DE)
English reference (DE): Vol. 1, Book 1, Hadith 613 (DE)
Arabic reference (DE): Book 1, Hadith 656 (DE)