The Book of Transactions (Kitab Al-Buyu`)

Muslim :: Book 10 : Hadith 3696

Ibn 'Umar (Allah be pleased with them) reported Allah's Messenger (may peace be upon him) having forbidden Muzabana, and Muzabana is the selling of dry dates by measure for fresh dates and the selling of raisins by measure for grapes and selling of all Ports of fruits on the basis of calculation.

Source materials are from the University of Southern California MSA site
Hadith eBooks converted from Imaan Star