The prohibition of selling fresh dates in exchange for dry dates except in the case of 'Araya Sahih Muslim 1542 e
Translation
Ibn 'Umar (Allah be pleased with them) reported Allah's Messenger (ﷺ) having forbidden Muzabana, and Muzabana implies the selling of dry dates for fresh dates on the tree with a definite measure (making it clear) that in case it increases, it belongs to me and if it is less, it is my responsibility.