Full Idea
We say there is the form of man, horse and health, but nothing else, making the same mistake as those who say that there are gods but that they are in the form of men. They just posit eternal men, and here we are not positing forms but eternal sensibles.
Gist of Idea
If gods are like men, they are just eternal men; similarly, Forms must differ from particulars
Source
comment on Plato (works [c.375 BCE]) by Aristotle - Metaphysics 997b
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.62