Musnad Ahmad 30:2174

Muhammad ibn Mus'ab narrated to us, al-Awza'i narrated to us, from Abu Kathir al-Ghubari, who said: I heard Abu Hurayrah saying: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Intoxicant (al-khamr) is from these two trees: the date palm and the grapevine."