Passage 10.33.6
Χαράδρα δὲ εἴκοσιν ἀπωτέρω σταδίοις ἐστὶν ὑπὲρ ὑψηλοῦ κειμένη κρημνοῦ, καὶ ὕδατος οἱ ἐνταῦθα σπανίζουσιν ἄνθρωποι, ποτὸν δέ σφισι ποταμός ἐστι Χάραδρος κατερχομένοις ὅσον τρία ἐπʼ αὐτὸν στάδια· ἐκδίδωσι δὲ ἐς τὸν Κηφισόν, καί μοι τὸ ὄνομα ἀπὸ τοῦ ποταμοῦ φαίνεται τεθῆναι τοῦ Χαράδρου τῇ πόλει. Χαραδραίοις δὲ Ἡρώων καλουμένων εἰσὶν ἐν τῇ ἀγορᾷ βωμοί, καὶ αὐτοὺς οἱ μὲν Διοσκούρων, οἱ δὲ ἐπιχωρίων εἶναί φασιν ἡρώων.
Charadra is situated twenty stadia farther on, standing above a high cliff. The inhabitants here suffer a shortage of water, and their drinking water comes from the Charadrus, a river three stadia away, down toward which they must descend. This river flows into the Cephisus, and it seems to me that the city derived its name from this river, Charadrus. The Charadrians have altars in their marketplace dedicated to those called the Heroes; some say that they are altars of the Dioscuri, others claim they belong to local heroes.