Passage 6.20.6
τοῖς δὲ τῶν Ἀρκάδων ἀποθανοῦσιν ἐν τῇ μάχῃ ἐστὶ τὸ μνῆμα ἐπὶ τοῦ λόφου διαβάντων τὸν Κλάδεον ὡς ἐπὶ ἡλίου δυσμάς. πλησίον δὲ τῆς Εἰλειθυίας ἐρείπια Ἀφροδίτης Οὐρανίας ἱεροῦ λείπεται, θύουσι δὲ καὶ αὐτόθι ἐπὶ τῶν βωμῶν.
The tomb of those Arcadians who died in the battle is on the hill after crossing the Cladeus river toward the west. Near the sanctuary of Eileithyia are the ruins remaining of a temple of Aphrodite Urania, and here also sacrifice is offered upon the altars.