Musnad Ahmad 30:3314

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