Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "The food of the son of Adam has been made a parable for this world. So look at what comes out of the son of Adam: even though he has spiced it and salted it (to make it as appealing as he can), he knows what it will eventually become."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 528