Sahih Bukhari
Asking Permission
Volume: 008 / Book Number: 074 / Hadith Number: 300
Narrated Abu Sa'id Al-Khudri:
The Prophet forbade two kinds of dresses and two kinds of bargains; Ishtimal As-Samma and Al-Ihtiba in one garment with no part of it covering one's private parts. (The two kinds of bargains were:) Al-Mulamasa and Al-Munabadha.