the Messenger of Allah forbade Mulamasah, which means touching a garment without looking at it, and Munabadha, which is where one man sells his garment to another man, by throwing it to him, without him checking it or looking at it.
Reference: Sunan an-Nasa'i 4510 In-book : Book 44, Hadith 62 English translation : Vol. 5, Book 44, Hadith 4514
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