Sahih al-Bukhari · Hadith 2256

Sales in which a Price is paid for Goods to be Delivered Later (As-Salam)

Narrated `Abdullah: The people used to sell camels on the basis of Habal-al-Habala. The Prophet (ﷺ) 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