From Sahih Muslim (Hadith 3883):
Zaid b Thabit (Allah be pleased with him) reported that Allah's Messenger (ﷺ) gave concession in case of al-'ariyya transactions (for exchanging dates) for dates with measure. Yahya said:'Ariyya implies that a person should buy fresh dates on the tree for his family to eat against a measure of dry dates
Reference: Muslim 3883