(62) باب بَيْعِ الْمُلاَمَسَةِ
Narrated Abu Sa`id:
Allah's Messenger (ﷺ) forbade the selling by Munabadha, i.e. to sell one's garment by casting it to the buyer not allowing him to examine or see it. Similarly he forbade the selling by Mulamasa. Mulamasa is to buy a garment, for example, by merely touching it, not looking at it.
Reference: Sahih al-Bukhari 2144
In-book reference: Book 34, Hadith 96
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 34, Hadith 354