Passage 8.36.2
ἔστι δὲ ἐν Μεθυδρίῳ Ποσειδῶνός τε Ἱππίου ναός, οὗτος μὲν ἐπὶ τῷ Μυλάοντί ἐστι· τὸ δὲ ὄρος τὸ Θαυμάσιον καλούμενον κεῖται μὲν ὑπὲρ τὸν ποταμὸν τὸν Μαλοίταν, ἐθέλουσι δὲ οἱ Μεθυδριεῖς τὴν Ῥέαν, ἡνίκα τὸν Δία εἶχεν ἐν τῇ γαστρί, ἐς τοῦτο ἀφικέσθαι τὸ ὄρος, παρασκευάσασθαι δὲ αὑτῇ καὶ βοήθειαν, ἢν ὁ Κρόνος ἐπʼ αὐτὴν ἴῃ, τόν τε Ὁπλάδαμον καὶ ἄλλους ὅσοι περὶ ἐκεῖνον ἦσαν γίγαντες·
There is in Methydrium a temple of Poseidon Hippios, situated along the river Mylaon. The mountain called Thaumasios stretches above the river Maloitas. The people of Methydrium say that Rhea, when she was pregnant with Zeus, came to this mountain and there prepared for herself a defense against Cronus, in case he attacked her, enlisting Hopladamos and other giants who were with him.