The Prophet (ﷺ) forbade the drinking of alcoholic drinks prepared from raisins, dates, unripe dates and fresh ripe dates.
Sahih al-Bukhari Book 74, Hadith 27
← Previous Hadith While I was serving Abu Talha. Abu Dujana and Abu Suhail bin Al-Baida' with a drink made from a mixture of unripe and ripe dates, alcoholic drinks, were made unlawful, whereupon I threw it away, and I was their butler and the youngest of them, and we used to consider that drink as an alcoholic drink in those days.

Sahih al-Bukhari Book 74, Hadith 26 Next Hadith → The Prophet (ﷺ) forbade the mixing of ripe and unripe dates and also the mixing of dates and raisins (for preparing a syrup) but the syrup of each kind of fruit should be prepared separately. ( One may have such drinks as long as it is fresh )

Sahih al-Bukhari Book 74, Hadith 28