Musnad Ahmad 28:589

Qutaybah narrated to us, Ibn Lahi'ah narrated to us, from Wahib ibn Abdullah, from Abdullah ibn Amr ibn al-As, that he said: I saw in what a sleeper sees, as if in one of my fingers was ghee, and in the other was honey, and I was licking them both. When I reached the morning, I mentioned that to the Messenger of Allah, peace and blessings of Allah be upon him. He said: "You read the two books: the Torah and the Furqan (the Quran)." And he used to read them both.