مُوَطَّأُ مَالِكٍ
Muwatta Malik 1362
Business Transactions
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, (ﷺ), forbade two sales in one sale.
Arabic/English book reference: Book 31, Hadith 72