Musnad Abu Ya'la al-Mawsili 127:6

Abu Bakr ibn Abi Shaybah narrated to us, Abu al-Ahwas narrated to us, from Abu Ishaq, from Burayd ibn Abi Maryam, from Anas, who said: We used to prepare nabidh (a drink made by soaking fruit in water) from fresh dates and unripe dates during the time of the Messenger of Allah, peace and blessings of Allah be upon him. When the prohibition of wine was revealed, we poured them both out from the vessels, and then we abandoned them.