Plutarch, De Iside et Osiride
Frank Cole Babbitt, Ed.

Stories akin to these and to others like them they say are related about Typhon ; how that, prompted by jealousy and hostility, he wrought terrible deeds and, by bringing utter confusion upon all things, filled the whole Earth, and the ocean as well, with ills, and later paid the penalty therefor. [p. 67] But the avenger, the sister and wife of Osiris, after she had quenched and suppressed the madness and fury of Typhon, was not indifferent to the contests and struggles which she had endured, nor to her own wanderings nor to her manifold deeds of wisdom and many feats of bravery, nor would she accept oblivion and silence for them, but she intermingled in the most holy rites portrayals and suggestions and representations of her experiences at that time, and sanctified them, both as a lesson in godliness and an encouragement for men and women who find themselves in the clutch of like calamities. She herself and Osiris, translated for their virtues from good demigods into gods,¹ as were Heracles and Dionysus later,² not incongruously enjoy double honours, both those of gods and those of demigods, and their powers extend everywhere, but are greatest in the regions above the earth and beneath the earth. In fact, men assert that Pluto is none other than Serapis and that Persephonê is Isis, even as Archemachus³ of Euboea has said, and also Heracleides Ponticus⁴ who holds the oracle in Canopus to be an oracle of Pluto.