Sahih al-Bukhari Book 74, Hadith 8
I was serving Abu 'Ubaida, Abu Talha and Ubai bin Ka`b with a drink prepared from ripe and unripe
dates. Then somebody came to them and said, "Alcoholic drinks have been prohibited." (On hearing
that) Abu Talha said, "Get up. O Anas, and pour (throw) it out! So I poured (threw) it out.
`Umar stood up on the pulpit and said, "Now then, prohibition of alcoholic drinks have been revealed, and these drinks are prepared from five things, i.e.. grapes, dates, honey, wheat or barley And an alcoholic drink is that, that disturbs the mind.
While I was waiting on my uncles and serving them with (wine prepared from) dates----and I was the youngest of them----it was said, "Alcoholic drinks have been prohibited." So they said (to me), "Throw it away." So I threw it away.