Sales in which a Price is paid for Goods to be Delivered Later (As-Salam)
Bukhari :: Book 3 :: Volume 35 :: Hadith 457
The people used to sell camels on the basis of Habal-al-Habala. The Prophet forbade such sale. Nafi' explained Habalal-Habala by saying. "The camel is to be delivered to the buyer after the she-camel gives birth."
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