Narrated 'Abdullah bin Yazid:
"Zaid, Abu Ayyash asked Sa'd regarding white wheat in exchange for barley: which of them was better ? He said the white, then he forbade that. Sa'd said: 'I heard the Messenger of Allah (ﷺ) being asked about selling dried dates for ripe dates and he said to those present: "Will the fresh dates shrink when they are dry ?" They said yes, so he forbade that.'"
Narrated Abu Hurairah:
The Messenger of Allah (ﷺ) prohibited Muhaqalah and Muzabanah.
[He said:] There are narrations on this topic from Ibn 'Umar, Ibn 'Abbas, Zaid bin Thabit, Sa'd, Jabir, Rafi' bin Khadij, and Abu Sa…
Another chain of narrators with similar meaning.
[Abu 'Eisa said:] This Hadith is Hasan Sahih, and this is acted upon according to the people of knowledge. It is the view of Ash-Shafi'i and our companions.