Hadith 513610
Chapter 31: Business Transactions - كتاب البيوع
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 the Messenger of Allah, may Allah bless him and grant him peace, forbade two sales in one sale.
Reference Muwatta Malik 513610
USC-MSA web (English) reference : Book 31, Hadith 72