Sahih Bukhari Volume 7, Book 72, Hadith Number 711.

Narrated By Abu Huraira : Allah’s Apostle forbade two types of dresses: (A) To sit in an Ihtiba’ posture in one garment nothing of which covers his private parts. (B) to cover one side of his body with one garment and leave the other side bare The Prophet also forbade the Mulamasa and Munabadha.