On Poetics - pg. 11

The iambic meter too came about in invectives as is fitting for them, on account of which even now it is called iambic because they used to lampoon [iambizon] one another in this meter. And some of the ancients became poets of heroic meter and some of iambs. Just as Homer was also especially the poet of things of stature (for not only did he make other things well but also dramatic imitations), so also was he the first to indicate the characteristic shape of comedy, making not invective but a drama of the laughable. For Margites stands in an analogy: just as the Iliad and the Odyssey are related to tragedies so is this related to comedies.