Pausania | Cult of dionysus calydonius (from “Description of Greece”)
[7.21.1] XXI. In this part of the city is also a sanctuary of Dionysus surnamed Calydonian, for the image of Dionysus too was brought from Calydon. When Calydon was still inhabited, among the Calydonians who became priests of the god was Coresus, who more than any other man suffered cruel wrongs because of love. He was in love with Callirhoe, a maiden. But the love of Coresus for Callirhoe was equalled by the maiden’s hatred of him.
[7.21.2] When the maiden refused to change her mind, in spite of the many prayers and promises of Coresus, he then went as a suppliant to the image of Dionysus. The god listened to the prayer of his priest, and the Calydonians at once became raving as though through drink, and they were still out of their minds when death overtook them. So they appealed to the oracle at Dodona. For the inhabitants of this part of the mainland, the Aetolians and their Acarnanian and Epeirot neighbors, considered that the truest oracles were the doves and the responses from the oak.
[7.21.3] On this occasion the oracles from Dodona declared that it was the wrath of Dionysus that caused the plague, which would not cease until Coresus sacrificed to Dionysus either Callirhoe herself or one who had the courage to die in her stead. When the maiden could find no means of escape, she next appealed to her foster parents. These too failing her, there was no other way except for her to be put to the sword.
[7.21.4] When everything had been prepared for the sacrifice according to the oracle from Dodona, the maiden was led like a victim to the altar. Coresus stood ready to sacrifice, when, his resentment giving way to love, he slew himself in place of Callirhoe. He thus proved in deed that his love was more genuine than that of any other man we know.
[7.21.5] When Callirhoe saw Goresus lying dead, the maiden repented. Overcome by pity for Goresus, and by shame at her conduct towards him, she cut her throat at the spring in Galydon not far from the harbor, and later generations call the spring Callirhoe after her.”