Sayyiduna Sahl bin Abi Hathmah (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) forbade selling dates that are still on the tree in exchange for dates that have been picked. However, he permitted the practice of ‘Ariyyah, allowing it to be sold by estimation so that the owner of the ‘Ariyyah may eat fresh dates in exchange for them.