Maliks Muwatta Book 49, Hadith Number 5.
Section : Prohibition against Eating with the Left Hand.
Yahya related to me from Malik from Abu’z-Zubayr from Jabir ibn Abdullah as-Salami that the Messenger of Allah, may Allah bless him and grant him peace, forbade a man to eat with his left hand or walk in one sandal or wrap a single garment around his drawn-up legs exposing his genitals.