Apollodorus Library 3.5.5

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  Polydorus, having become king of Thebes, married Nycteis, daughter of Nycteus, son of Chthonius, and begat Labdacus, who perished after Pentheus because he was like-minded with him. ¹ But Labdacus having left a year -old son, Laius, the government was usurped by Lycus, brother of Nycteus, so long as Laius was a child. Both of them ² had fled [ from Euboea] because they had killed Phlegyas, son of Ares and Dotis the Boeotian, ³ and they took up their abode at Hyria, and thence having come to Thebes, they were enrolled as citizens through their friendship with Pentheus. So after being chosen commander-in-chief by the Thebans, Lycus compassed the supreme power and reigned for twenty years, but was murdered by Zethus and Amphion for the following reason. Antiope was a daughter of Nycteus, and Zeus had intercourse with her. ⁴ When she was with child, and her father threatened her, she ran away to Epopeus at Sicyon and was married to him. In a fit of despondency Nycteus killed himself, after charging Lycus to punish Epopeus and Antiope. Lycus marched against Sicyon, subdued it, slew Epopeus, and led Antiope away captive. On the way she gave birth to two sons at Eleurethae in Boeotia. The infants were exposed, but a neatherd found and reared them, and he called the one Zethus and the other Amphion. Now Zethus paid attention to cattle-breeding, but Amphion practised minstrelsy, for Hermes had given him a lyre. ⁵ But Lycus and his wife Dirce imprisoned Antiope and treated her despitefully. Howbeit, one day her bonds were loosed of themselves, and unknown to her keepers she came to her sons cottage, begging that they would take her in. They recognized their mother and slew Lycus, but Dirce they tied to a bull, and flung her dead body into the spring that is called Dirce after her. And having succeeded to the sovereignty they fortified the city, the stones following Amphion's lyre ⁶ ; and they expelled Laius. ⁷ He resided in Peloponnese, being hospitably received by Pelops; and while he taught Chrysippus, the son of Pelops, to drive a chariot, he conceived a passion for the lad and carried him off. ⁸