Narrated `Abdullah bin `Umar: Allah's Apostle forbade Muzabana; and Muzabana means the selling of fresh dates (on the trees) for dried dates by measure and also the selling of fresh grapes for dried grapes by measure.
Hadith ReferenceSahih Bukhari / The Book of Sales (Bargains) / Hadith: 2185
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة