حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ ‏.‏ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَى عَنْ بَيْعَتَيْنِ فِي بَيْعَةٍ ‏.‏

Yahya related to me from Malik that he had heard that theMessenger of Allah, may Allah bless him and grant him peace, forbadetwo sales in one sale. Translation Not Available

Book Ref: Muwatta Imam Malik Book 31 Hadith 1362
Web Ref:  Muwatta Imam Malik Book 31 Hadith 72