The Messenger of Allah ﷺ forbade two ways of dressing and two ways of selling.As for the two ways of selling, they are mulamasah and munabadhah. Munabadhah is when the seller says, "Once I throw you this garment, the sale is binding." Mulamasah is when the buyer touches the garment with his hand without unfolding or examining it, and once he touches it the sale becomes binding.
أخبرنا محمد بن رافع قال حدثنا عبد الرزاق قال حدثنا معمر عن الزهري عن عطاء بن يزيد
نهى رسول الله ﷺ عن لبستين وعن بيعتين أما البيعتان فالملامسة والمنابذة والمنابذة أن يقول إذا نبذت هذا الثوب فقد وجب يعني البيع والملامسة أن يمسه بيده ولا ينشره ولا يقلبه إذا مسه فقد وجب البيع
Bukhari narrated it in "Sales," chapter "The sale of munabadhah," Hadith: 2147 and 6284, from the hadith of Zuhri, through him, and it is in Kubra, Hadith: 6106. Abu Dawud also narrated it, Hadith: 3378, from the hadith of Abdul-Razzaq, through him.