Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates from Sayyiduna Zayd bin Thabit (may Allah be pleased with him); he said: The Messenger of Allah (peace and blessings be upon him) permitted araya to be sold for dates according to their estimated amount.
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4746