Hesiod, the Homeric Hymns and Homerica/Hymn XXV (To the Muses and Apollo)
TO THE MUSES AND APOLLO
I will begin with the Muses and Apollo and Zeus. For it is through the Muses and Apollo that there are singers upon the earth and players upon the lyre; but kings are from Zeus. Happy is he whom the Muses love: sweet flows speech from his lips.
Hail, children of Zeus! Give honour to my song! And now I will remember you and another song also.