Passage 1.26.3
Ὀλυμπιοδώρῳ δὲ τόδε μέν ἐστιν ἔργον μέγιστον χωρὶς τούτων ὧν ἔπραξε Πειραιᾶ καὶ Μουνυχίαν ἀνασωσάμενος· ποιουμένων δὲ Μακεδόνων καταδρομὴν ἐς Ἐλευσῖνα Ἐλευσινίους συντάξας ἐνίκα τοὺς Μακεδόνας. πρότερον δὲ ἔτι τούτων ἐσβαλόντος ἐς τὴν Ἀττικὴν Κασσάνδρου πλεύσας Ὀλυμπιόδωρος ἐς Αἰτωλίαν βοηθεῖν Αἰτωλοὺς ἔπεισε, καὶ τὸ συμμαχικὸν τοῦτο ἐγένετο Ἀθηναίοις αἴτιον μάλιστα διαφυγεῖν τὸν Κασσάνδρου πόλεμον. Ὀλυμπιοδώρῳ δὲ τοῦτο μὲν ἐν Ἀθήναις εἰσὶν ἔν τε ἀκροπόλει καὶ ἐν πρυτανείῳ τιμαί, τοῦτο δὲ ἐν Ἐλευσῖνι γραφή· καὶ Φωκέων οἱ Ἐλάτειαν ἔχοντες χαλκοῦν Ὀλυμπιόδωρον ἐν Δελφοῖς ἀνέθεσαν, ὅτι καὶ τούτοις ἤμυνεν ἀποστᾶσι Κασσάνδρου.
For Olympiodorus, aside from the accomplishments of recovering Piraeus and Munychia, the following exploit was his greatest deed: when the Macedonians made an incursion into Eleusis, Olympiodorus organized the Eleusinians and defeated the Macedonians. Even earlier than these events, when Cassander invaded Attica, Olympiodorus sailed to Aetolia, persuaded the Aetolians to provide aid, and secured this alliance which particularly enabled the Athenians to escape the war against Cassander. For these actions, Olympiodorus was honored at Athens on the Acropolis and in the Prytaneion, and in Eleusis an inscription commemorates him. The Phocians who occupied Elateia also dedicated a bronze statue of Olympiodorus at Delphi, because he had aided them when they revolted against Cassander.