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).