Bushayr bin Yasar narrates from some of the Companions of the Prophet (peace and blessings be upon him) (may Allah be pleased with them) that the Messenger of Allah (peace and blessings be upon him) forbade selling the fruit on the tree for dried dates and said: "This is a need, that is, muzabanah."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب البيوع / 10658