Musnad Ahmad 931:7

Abdullah narrated to us, Muhammad ibn Abd al-Rahim Abu Yahya al-Bazzaz narrated to us, Abu Hudhayfah Musa ibn Mas'ud narrated to us, Sufyan narrated to us, from Yunus ibn Ubayd, from al-Hasan, from Utiy, from Ubayy ibn Ka'b, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, the food of the son of Adam has been made as a parable for the worldly life, even if he seasons it and salts it, so look at what it becomes."