Ibn ‘Umar said that God's Messenger forbade the transaction called <i>habal al-habala</i> which was one entered into in pre-Islamic times, 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. (Bukhari and Muslim.)

وَعَنِ ابْنِ عُمَرَ قَالَ: نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَن بَيْعِ حَبَلِ الْحَبَلَةِ وَكَانَ بَيْعًا يَتَبَايَعُهُ أَهْلُ الْجَاهِلِيَّةِ كَانَ الرَّجُلُ يَبْتَاعُ الْجَزُورَ إِلَى أَنْ تُنتَجَ النَّاقةُ ثمَّ تُنتَجُ الَّتِي فِي بطنِها