Ovid
The Metamorphoses of Ovid, Book II (Fable. 4)
Cycnus, king of Liguria, inconsolable for the death of Phaëton, is transformed into a swan.

Cycnus, the son of Sthenelus,58 was present at this strange event; who, although he was related to thee, Phaëton, on his mother’s side, was yet more nearly allied in affection. He having left his kingdom (for he reigned over the people and the great cities of the Ligurians59) was filling the verdant banks and the river Eridanus, and the wood, now augmented by the sisters, with his complaints; when the man’s voice became shrill, and gray feathers concealed his hair. A long neck, too, extends from his breast, and a membrane joins his reddening toes; feathers clothe his sides, and his mouth holds a bill without a point. Cycnus becomes a new bird; but he trusts himself not to the heavens or the air, as being mindful of the fire unjustly sent from thence. He frequents the pools and the wide lakes, and abhorring fire, he chooses the streams, the very contrary of flames.

Meanwhile, the father of Phaëton, in squalid garb, and destitute of his comeliness, just as he is won't to be when he suffers an eclipse of his disk, abhors both the light, himself, and the day; and gives his mind up to grief, and adds resentment to his sorrow, and denies his services to the world. “My lot,” says he, “has been restless enough from the very beginning of time, and I am tired of labors endured by me, without end and without honor. Let any one else drive the chariot that carries the light. If there is no one, and all the Gods confess that they cannot do it, let Jupiter himself drive it; that, at least, while he is trying my reins, he may for a time lay aside the lightnings that bereave fathers. Then he will know, having made trial of the strength of the flame-footed steeds, that he who did not successfully guide them, did not deserve death.”

All the Deities stand around the Sun, as he says such things; and they entreat him, with suppliant voice, not to determine to bring darkness over the world. Jupiter, as well, excuses the hurling of his lightnings, and imperiously adds threats to entreaties. Phœbus calls together his steeds, maddened and still trembling with terror, and, subduing them, vents his fury both with whip and lash; for he is furious, and upbraids them with his son, and charges his death upon them.

Footnotes:

58. Sthenelus.]—Ver. 367. He was a king of Liguria. Commentators have justly remarked that it was not very likely that a king of Liguria should be related to Clymene, a queen of the Ethiopians, as Ovid, in the next line, says was the case. This story was probably invented by some writer, who fancied that there were two persons of the name of Phaëton; one the subject of eastern tradition, and the other a personage of the Latin mythology.

59. The Ligurians.]—Ver. 370. These were a people situate on the eastern side of Etruria, between the rivers Var and Macra. The Grecian writers were in the habit of styling the whole of the north of Italy Liguria.