What had Prophet Muhammad (peace be upon him) forbade the sale of fruits until their benefit was evident and the sale of date palms until the dates (were) almost ripe?
 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."