Musnad Ahmad 33:589

Ishaq ibn Isa narrated to us, Malik ibn Anas informed us, from Abu al-Zubayr, from Jabir: "That the Messenger of Allah (peace and blessings of Allah be upon him) forbade that a man should eat with his left hand, or walk in one sandal, or wear the *al-samma'* garment (wrapping oneself in a single garment such that no opening is left for the arms), or sit in a single garment while exposing his private parts."