Histories

and in his great and terrible grief at this mischance he called on Zeus by three names—Zeus the Purifier, Zeus of the Hearth, Zeus of Comrades: the first, because he wanted the god to know what evil his guest had done him; the second, because he had received the guest into his house and thus unwittingly entertained the murderer of his son; and the third, because he had found his worst enemy in the man whom he had sent as a protector.