Passage 3.25.1
προελθόντι δὲ ἀπὸ τοῦ μνήματος ἐκδίδωσιν ἐς θάλασσαν ποταμός, ὄνομα δέ οἱ Σκύρας, ὅτι κατὰ τοῦτον ἀνώνυμον τέως ὄντα Πύρρος ὁ Ἀχιλλέως ἔσχε ταῖς ναυσίν, ἡνίκα ἐπὶ τὸν Ἑρμιόνης γάμον ἔπλευσεν ἐκ Σκύρου. διαβάντων δὲ τὸν ποταμὸν ἔστιν ἱερὸν ἀρχαῖον ἀπωτέρω Διὸς βωμοῦ. τοῦ ποταμοῦ δὲ σταδίους τεσσαράκοντα ἀπέχει Πύρριχος ἐν μεσογαίᾳ. τὸ δὲ ὄνομα τῇ πόλει γενέσθαι φασὶν ἀπὸ Πύρρου τοῦ Ἀχιλλέως, οἱ δὲ εἶναι θεὸν Πύρριχον τῶν καλουμένων
After passing forward from the tomb, a river flows into the sea; it is called Scyras, because Pyrrhus son of Achilles once anchored his ships there, at which time he sailed from Scyros for his marriage with Hermione. After crossing the river, at some distance further is an ancient sanctuary of Zeus, with an altar. Forty stadia inland from the river lies Pyrrhichus. They say that the city took its name from Pyrrhus son of Achilles, but some claim Pyrrhichus was one of those called gods.