Musnad Abu Ya'la al-Mawsili 140:46

Al-Hasan ibn Qaza'ah narrated to us, 'Atham narrated to us, from al-A'mash, from Yazid al-Raqashi, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, the vision has an inner meaning, so interpret it by its interpretation and name it by its names. And the vision is for the first interpreter."