The misfortunes of his family oblige Cadmus to leave Thebes, and to retire with his wife Hermione to Illyria, where they are changed into serpents.

The son of Agenor knows not that his daughter and his little grandson are now Deities of the sea. Forced by sorrow, and a succession of calamities, and the prodigies which, many in number, he had beheld, the founder flies from his city, as though the ill-luck of the spot, and not his own, pressed hard upon him, and driven, in a long series of wandering, he reaches the coast of Illyria, with his exiled wife. And now, loaded with woes and with years, while they are reflecting on the first disasters of their house, and in their discourse are recounting their misfortunes, Cadmus says, “Was that dragon a sacred one, that was pierced by my spear, at the time when, setting out from Sidon, I sowed the teeth of the dragon in the ground, a seed till then unknown? If the care of the Gods avenges this with resentment so unerring, I pray that I myself, as a serpent, may be lengthened out into an extended belly.” Thus he says; and, as a serpent, he is lengthened out into an extended belly, and perceives scales growing on his hardened skin, and his black body become speckled with azure spots; and he falls flat on his breast, and his legs, joined into one, taper out by degrees into a thin round point. His arms are still remaining; those arms which remain he stretches out; and, as the tears are flowing down his face, still that of a man, he says, “Come hither, wife, come hither, most unhappy one, and, while something of me yet remains, touch me; and take my hand, while it is still a hand, and while I am not a serpent all over.” He, indeed, desires to say more, but, on a sudden, his tongue is divided into two parts. Nor are words in his power when he offers to speak; and as often as he attempts to utter any complaints, he makes a hissing: this is the voice that Nature leaves him. His wife, smiting her naked breast with her hand, cries aloud, “Stay, Cadmus! and deliver thyself, unhappy one, from this monstrous form. Cadmus, what means this? Where are thy feet? where are both thy shoulders and thy hands? where is thy color and thy form, and, while I speak, where all else besides? Why do ye not, celestial Gods, turn me as well into a similar serpent?” Thus she spoke; he licked the face of his wife, and crept into her dear bosom, as though he recognized her; and gave her embraces, and reached her well-known neck.

Whoever is by, (some attendants are present), is alarmed; but the crested snakes soothe them with their slippery necks, and suddenly they are two serpents, and in joined folds they creep along, until they enter the covert of an adjacent grove. Now, too, do they neither shun mankind, nor hurt them with wounds, and the gentle serpents keep in mind what once they were.