Narrated Anas bin Malik: The Prophet forbade the sale of fruits till their benefit is evident; and the sale of date palms till the dates are almost ripe. He was asked what 'are almost ripe' meant. He replied, "Got red and yellow."
Hadith Referenceصحيح البخاري / كتاب البيوع / 2197
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة