Passage 7.25.11
σταδίων ἐπὶ τὸν Ἡρακλέα ὡς τριάκοντα ἐξ Ἑλίκης ὁδὸς ἡ εὐθεῖά ἐστι. προελθόντι δὲ ἀπὸ τοῦ Ἡρακλέους ποταμὸς ἐς θάλασσαν ἐκδίδωσιν ἀέναος ἐξ ὄρους Ἀρκαδικοῦ κατερχόμενος, ὄνομα δὲ αὐτῷ τε καὶ τῷ ποταμῷ Κρᾶθις καὶ ἔνθα αἱ πηγαὶ τοῦ ποταμοῦ τῷ ὄρει· ἀπὸ ταύτης τῆς Κράθιδος καὶ πρὸς Κρότωνι τῇ ἐν Ἰταλίᾳ ποταμὸς ὄνομα ἔσχηκε.
The straight road from Helice to the sanctuary of Heracles is about thirty stadia. When one proceeds beyond the sanctuary of Heracles, a perennial river flows from an Arcadian mountain down to the sea. The name of both the river and the mountain where the river has its springs is Crathis. From this Crathis the river near Croton in Italy also derived its name.