He said: There are narrations on this topic from Abu Sa'eed and Ibn 'Umar.
[Abu 'Eisa said:] The Hadith is Abu Hurairah is a Hasan Sahih Hadith. And the meaning of (Munabadhah) in this Hadith is when it is said: "When I throw something to you then the sale between you and I is concluded." And Al-Mulamasah is that he says: "When you touch something then the sale is concluded." Even if he did not see it at all, like if it was inside of a bag or something else. There are merely sales practices of the people of Jahiliyyah so they were prohibited.
In-book : Book 14, Hadith 113
English translation : Vol. 1, Book 12, Hadith 1310