Narrated Ibn `Umar: Allah's Apostle forbade Al-Muzabana, i.e. to sell ungathered dates of one's garden for measured dried dates or fresh ungathered grapes for measured dried grapes; or standing crops for measured quantity of foodstuff. He forbade all such bargains.
Hadith Referenceصحيح البخاري / كتاب البيوع / 2205
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة