Narrated Abu Sa`id Al-Khudri: The Prophet forbade Ishtimal-as-Samma' and that a man should sit in an Ihtiba' posture in one garment, nothing of which covers his private parts.
Hadith ReferenceSahih Bukhari / The Book of Dress / Hadith: 5822
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة