The Republic by Plato Part 10 Page 42

And now since we have reverted to the subject of poetry, let this our defence serve to show the reasonableness of our former judgment in sending away out of our State an art having the tendencies which we have described; for reason constrained us. But that she may not impute to us any harshness or want of politeness, let us tell her that there is an ancient quarrel between philosophy and poetry; of which there are many proofs, such as the saying of ‘the yelping hound howling at her lord,’ or of one ‘mighty in the vain talk of fools,’ and ‘the mob of sages circumventing Zeus,’ and the ‘subtle thinkers who are beggars after all’; and there are innumerable other signs of ancient enmity between them.

Notwithstanding this, let us assure our sweet friend and the sister arts of