Passage 9.34.4
Κορωνείας δὲ σταδίους ὡς τεσσαράκοντα ὄρος ἀπέχει τὸ Λιβήθριον, ἀγάλματα δὲ ἐν αὐτῷ Μουσῶν τε καὶ νυμφῶν ἐπίκλησίν ἐστι Λιβηθρίων· καὶ πηγαὶ---τὴν μὲν Λιβηθριάδα ὀνομάζουσιν, ἡ δὲ ἑτέρα †Πέτρα---γυναικὸς μαστοῖς εἰσιν εἰκασμέναι, καὶ ὅμοιον γάλακτι ὕδωρ ἀπʼ αὐτῶν ἄνεισιν.
Mount Libethrius is about forty stades distant from Coroneia. On this mountain are statues of the Muses and of the nymphs known as Libethrian. There are springs as well: one they call Libethrias, and the other Petra. These are shaped like a woman's breasts, and from them flows water resembling milk.