the messenger of Allah forbade Muzabana, and Muzabanah means selling fresh dates still on tree for dried dates by measure, and selling fresh grapes for raisins by measure.
Sunan an-Nasa'i Book 44, Hadith 86
← Previous Hadith the Messenger of Allah forbade Muzabanah. Ad Muzabanah is when what is art the tops of the trees is sold for a certain amount f dried dates; if there are more then I gain, and if there are less the I lose.

Sunan an-Nasa'i Book 44, Hadith 85 Next Hadith → "the Messenger of Allah forbade Muhaqalah and Muzabana."(Hasan )

Sunan an-Nasa'i Book 44, Hadith 87