Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) "forbade muhaqalah and muzabanah, and granted a concession to the people of 'araya to sell them according to their estimate." Then he said: "One, two, three and four wasqs."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10668