Volume 3, Book 35, Number 451:
Narrated Abu Al-Bakhtari:
I asked Ibn Umar about Salam (the fruits of) date-palms. He replied, “The Prophet forbade the sale
of dates till their benefit becomes evident and fit for eating and also the sale of silver (for gold) on
credit.” I asked Ibn ‘Abbas about Salam for dates and he replied, “The Prophet forbade the sale of
dates till they were fit for eating and could be estimated.”