Passage 10.32.19
τὸ δὲ ἔλαιον τὸ ἐν τῇ Τιθορέων ἀποδεῖ μὲν πλήθει τοῦ τε Ἀττικοῦ καὶ τοῦ Σικυωνίου, χρόᾳ δὲ ὑπερβάλλει καὶ ἡδονῇ τὸ Ἰβηρικὸν καὶ τὸ ἐκ τῆς νήσου τῆς Ἰστρίας· καὶ μύρα τε ἀπʼ αὐτοῦ παντοῖα ἑψοῦσι καὶ τὸ ἔλαιον ὡς βασιλέα ἄγουσιν.
The olive-oil produced at Tithorea is inferior in quantity to that of Attica and Sicyon, but surpasses the Iberian and that from the island of Istria in appearance and flavor. Moreover, they prepare all manner of perfumes from it, and esteem this oil as they would a king.