Passage 9.27.1
θεῶν δὲ οἱ Θεσπιεῖς τιμῶσιν Ἔρωτα μάλιστα ἐξ ἀρχῆς, καί σφισιν ἄγαλμα παλαιότατόν ἐστιν ἀργὸς λίθος. ὅστις δὲ ὁ καταστησάμενος Θεσπιεῦσιν Ἔρωτα θεῶν σέβεσθαι μάλιστα, οὐκ οἶδα. σέβονται δὲ οὐδέν τι ἧσσον καὶ Ἑλλησποντίων Παριανοί, τὸ μὲν ἀνέκαθεν ἐξ Ἰωνίας καὶ Ἐρυθρῶν ἀπῳκισμένοι, τὰ δὲ ἐφʼ ἡμῶν τελοῦντες ἐς Ῥωμαίους.
Among the gods, the Thespians honor Eros above all from the earliest times, and their most ancient image of him is an unwrought stone. Who it was that first established among the Thespians this particular veneration of Eros more than the other deities, I do not know. Eros is held in equal reverence by the Parians on the Hellespont, who originally migrated out of Ionia and Erythrae, and who in our times pay tribute to the Romans.