Mukhtasar Bukhari

Narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) forbade the sale of Habal al-Habalah. This sale was prevalent in the days of ignorance in such a way that a person would buy a she-camel and set the payment term as follows: when this she-camel gives birth, and then the offspring in her womb grows up and gives birth (then I will pay the price).