The prohibition of Khamr, which may be made from the juice of grapes, dried dates, unripe dates, raisins and other things that intoxicate — Sahih Muslim 1980 g

I was serving drink to Abu 'Ubaida b. jarrah, Abu Talha and Ubayy b. Ka'b prepared from unripe dates and fresh dates when a visitor came and he said: Verily liquor has been prohibited. Thereupon, Abu Talha said: Anas, stand up and break this pitcher. I stool up and (took hold) of a pointed stone and struck the pitcher with its lower part until it broke into pieces.