Narrated `Abdullah: The people used to sell camels on the basis of Habal-al-Habala. The Prophet forbade such sale. Nafi` explained Habal-al-Habala by saying. "The camel is to be delivered to the buyer after the she-camel gives birth."

Narrated Ibn `Umar: The Prophet said, "He who buys foodstuff should not sell it till he has received it."

Narrated `Abdullah bin `Umar: Allah's Apostle forbade the sale called 'Habal-al-Habala which was a kind of sale practiced in the Pre- Islamic Period of ignorance. One would pay the price of a she-camel which was not born yet would be born by the immediate offspring of an extant she-camel.

Narrated Ibn `Umar: In the pre-lslamic period of ignorance the people used to bargain with the meat of camels on the principle of Habal-al-Habala which meant the sale of a she-camel that would be born by a she-camel that had not yet been born. The Prophet forbade them such a transaction.