Passage 2.25.1
ἡ δʼ ἐς Μαντίνειαν ἄγουσα ἐξ Ἄργους ἐστὶν οὐχ ἥπερ καὶ ἐπὶ Τεγέαν, ἀλλὰ ἀπὸ τῶν πυλῶν τῶν πρὸς τῇ Δειράδι. ἐπὶ δὲ τῆς ὁδοῦ ταύτης ἱερὸν διπλοῦν πεποίηται, καὶ πρὸς ἡλίου δύνοντος ἔσοδον καὶ κατὰ ἀνατολὰς ἑτέραν ἔχον. κατὰ μὲν δὴ τοῦτο Ἀφροδίτης κεῖται ξόανον, πρὸς δὲ ἡλίου δυσμὰς Ἄρεως· εἶναι δὲ τὰ ἀγάλματα· Πολυνείκους λέγουσιν ἀναθήματα καὶ Ἀργείων, ὅσοι τιμωρήσοντες αὐτῷ συνεστρατεύοντο.
The road from Argos to Mantinea is not the same as the one leading toward Tegea, but it begins from the gates near Deiras. Upon this road there is built a double sanctuary, having one entrance facing west and another facing east. In the eastern section stands a wooden statue of Aphrodite, and in the western part, one of Ares. They say that these statues were dedicated by Polynices and by the Argives who joined him in his expedition, seeking vengeance on his behalf.