Shama'il Muhammadiyah #116

Al-Ash'ath ibn Sulaim said: "I heard my maternal aunt relate, on the authority of her paternal uncle; 'While I was walking in Medina, someone behind me said: ‘Raise your loincloth, for that is more pious and conducive to longer wear.’ Lo and behold, he was Allah’s Messenger (Allah bless him and give him peace)', so I said: ‘O Messenger of Allah, it is simply a black garment with white stripes!’ He said: ‘Do you not have an example in me?’ so I looked and noticed that his loincloth was to half his shins'.”