Sales in which a Price is paid for Goods to be Delivered Later (As-Salam)
Bukhari :: Book 3 :: Volume 35 :: Hadith 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."
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