The prohibition of selling fresh dates in exchange for dry dates except in the case of 'Araya Sahih Muslim 1540 e
Translation
Sahl b. Abu Hathma reported Allah's Messenger (ﷺ) having forbidden Muzabana, i. e. exchange of fresh dates with dry dates. except in case of those to whom donations of some trees have been made. It is for them that concession has been given.