Passage 10.32.4
Θεμισώνιον δὲ τὸ ὑπὲρ Λαοδικείας Φρύγες μὲν καὶ τοῦτο οἰκοῦσιν· ὅτε δὲ ὁ Γαλατῶν στρατὸς ἔφερε καὶ ἦγεν Ἰωνίαν καὶ Ἰωνίας τὰ ὅμορα, οἱ Θεμισωνεῖς φασιν αὑτοῖς Ἡρακλέα βοηθὸν καὶ Ἀπόλλωνα γενέσθαι καὶ Ἑρμῆν· τούτους γὰρ τοῖς τὰς ἀρχὰς ἔχουσιν ἄντρον τε διʼ ὀνειράτων δεῖξαι καὶ ἀποκρυφθῆναι Θεμισωνεῦσι καὶ γυναιξὶν αὐτῶν καὶ παισὶν ἐς τοῦτο προστάξαι τὸ ἄντρον.
The place called Themisonion, which lies above Laodiceia, is also inhabited by Phrygians. When the Galatian army was ravaging and overrunning Ionia and the territories adjoining Ionia, the people of Themisonion claim that Heracles, Apollo, and Hermes came to their aid. These gods revealed a cave through dreams to the local magistrates, and thus the people of Themisonion, together with their wives and children, were commanded to take refuge in this cave.