From Sahih Muslim (Hadith 5135):
Anas b. Malik reported I was serving wine to Abu Talha, and Abu Dujana. and Mu'adh b. jabal admidst a group of Ansar when a visitor came to us and said There is a fresh news; the (verses) concerning the prohibition of liquor have been revealed. So we spilt it on that day; and it was a mixture of dry dates and fresh dates. Anas b. Malik said:Whil Khamr was declared unlawful, the common liquor of theirs was then a mixture of dry dates and fresh dates
Reference: Muslim 5135