Εἰς τὸν ἐκ τοῦ χρησμοῦ τοῦ Ποσειδῶνος φοιτήσαντα.
Its heading says the speech was addressed to a student who came to Himerius at the bidding of an oracle of Poseidon. The speech itself does not survive.
Himerius the Sophist Declamations and Orations: Oration 58 in Greek in PDF
Himerius the Sophist Declamations and Orations: Oration 58 in Greek in MD
Part of Declamations and Orations