Sunan Abi Dawud — Commercial Transactions (Kitab Al-Buyu) — Hadith No: 3363
Translation
Narrated Sahl b. Abi Khathmah:The Messenger of Allah (ﷺ) forbade the sale of fruits for dried dates, but gave license regarding the 'araya for its sale on the basis of a calculation of their amount. But those who buy them can eat them when fresh