Hesiod, the Homeric Hymns and Homerica/Hymn XXI (To Apollo)
XXI
TO APOLLO
Phoebus, of you even the swan sings with clear voice to the beating of his wings, as he alights upon the bank by the eddying river Peneus; and of you the sweet-tongued minstrel, holding his high-pitched lyre, always sings both first and last.
And so hail to you, lord! I seek your favour with my song.