Narrated [Ibn 'Umar (RA)] : Allah's Messenger ( صلی اللہ علیہ وسلم ) forbade the transaction called 'Habalal-Habalah" which was one entered into in the Jahiliya era, whereby a man bought a she-camel which was to be the offspring of a she-camel which was still in its mother's womb. [Agreed upon, and the wording is al-Bukhari's] .