حَدَّثَنِي يَحْيَى، عَنْ مَالِك أَنَّهُ بَلَغَهُ، أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ " نَهَى عَنْ بَيْعَتَيْنِ فِي بَيْعَةٍ "
Imam Malik (may Allah have mercy on him) was informed that the Messenger of Allah (peace and blessings be upon him) forbade two sales in one sale.