Hazrat Abu Sa'id (may Allah be pleased with him) narrated that we used to receive different types of dates together (from the Prophet Muhammad, peace be upon him), and we used to sell two sa' of dates in exchange for one sa'. Upon this, the Prophet Muhammad (peace be upon him) said that two sa' should not be sold in exchange for one sa', nor should two dirhams be sold in exchange for one dirham.
Hadith Referenceاللؤلؤ والمرجان / كتاب المساقاة / 1026
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 34 كتاب البيوع: 20 باب بيع الخلط من التمر»