Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Prophet Muhammad (peace and blessings be upon him) forbade selling the fruit of a date-palm tree in exchange for dates by measure, and selling grapes in exchange for raisins by measure, and selling a (wheat) field in exchange for wheat by measure.
Hadith Referenceصحیح ابن حبان / كتاب البيوع / 4999
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح: م (5/ 15).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما