Apollodorus Library 3.7.5

[5]
  After the capture of Thebes, when Alcmaeon learned that his mother Eriphyle had been bribed to his undoing also, ¹ he was more incensed than ever, and in accordance with an oracle given to him by Apollo he killed his mother. ² Some say that he killed her in conjunction with his brother Amphilochus, others that he did it alone. But Alcmaeon was visited by the Fury of his mother's murder, and going mad he first repaired to Oicles ³ in Arcadia, and thence to Phegeus at Psophis. And having been purified by him he married Arsinoe, daughter of Phegeus, ⁴ and gave her the necklace and the robe. But afterwards the ground became barren on his account, ⁵ and the god bade him in an oracle to depart to Achelous and to stand another trial on the river bank. ⁶ At first he repaired to Oeneus at Calydon and was entertained by him; then he went to the Thesprotians, but was driven away from the country; and finally he went to the springs of Achelous, and was purified by him, ⁷ and received Callirrhoe, his daughter, to wife. Moreover he colonized the land which the Achelous had formed by its silt, and he took up his abode there. ⁸ But afterwards Callirrhoe coveted the necklace and robe, and said she would not live with him if she did not get them. So away Alcmaeon hied to Psophis and told Phegeus how it had been predicted that he should be rid of his madness when he had brought the necklace and the robe to Delphi and dedicated them. ⁹ Phegeus believed him and gave them to him. But a servant having let out that he was taking the things to Callirrhoe, Phegeus commanded his sons, and they lay in wait and killed him. ¹⁰ When Arsinoe upbraided them, the sons of Phegeus clapped her into a chest and carried her to Tegea and gave her as a slave to Agapenor, falsely accusing her of Alcmaeon's murder.