Sahih al-Bukhari Book 74, Hadith 7
`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.
"Alcoholic drinks were prohibited at the time we could rarely find wine made from grapes in Medina, for most of our liquors were made from unripe and ripe dates.
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.