Passage 2.22.7
καὶ ἐπὶ τῷδε Εὐφορίων Χαλκιδεὺς καὶ Πλευρώνιος Ἀλέξανδρος ἔπη ποιήσαντες, πρότερον δὲ ἔτι Στησίχορος ὁ Ἱμεραῖος, κατὰ ταὐτά φασιν Ἀργείοις Θησέως εἶναι θυγατέρα Ἰφιγένειαν. τοῦ δὲ ἱεροῦ τῆς Εἰληθυίας πέραν ἐστὶν Ἑκάτης ναός, Σκόπα δὲ τὸ ἄγαλμα ἔργον. τοῦτο μὲν λίθου· τὰ δʼ ἀπαντικρὺ χαλκᾶ, Ἑκάτης καὶ ταῦτα ἀγάλματα, τὸ μὲν Πολύκλειτος ἐποίησε, τὸ δὲ ἀδελφὸς Πολυκλείτου Ναυκύδης †Μόθωνος.
On this matter Euphorion of Chalcis and Alexander of Pleuron, who composed poems, as well as Stesichorus of Himera even earlier, agree with the Argives, claiming similarly that Iphigenia was the daughter of Theseus. Beyond the sanctuary of Eileithyia stands a temple of Hecate, with a statue by Scopas; this one is of stone. Opposite it are bronze statues, also representations of Hecate; one made by Polycleitus, the other by Polycleitus' brother Naucydes of Argos.