Passage 1.23.8
ἵππος δὲ ὁ καλούμενος Δούριος ἀνάκειται χαλκοῦς. καὶ ὅτι μὲν τὸ ποίημα τὸ Ἐπειοῦ μηχάνημα ἦν ἐς διάλυσιν τοῦ τείχους, οἶδεν ὅστις μὴ πᾶσαν ἐπιφέρει τοῖς Φρυξὶν εὐήθειαν· λέγεται δὲ ἔς τε ἐκεῖνον τὸν ἵππον ὡς τῶν Ἑλλήνων ἔνδον ἔχοι τοὺς ἀρίστους, καὶ δὴ καὶ τοῦ χαλκοῦ τὸ σχῆμά ἐστι κατὰ ταῦτα· καὶ Μενεσθεὺς καὶ Τεῦκρος ὑπερκύπτουσιν ἐξ αὐτοῦ, προσέτι δὲ καὶ οἱ παῖδες οἱ Θησέως.
There is a bronze horse there called the Trojan Horse. That this contrivance of Epeius was built for the purpose of breaching the city's walls no one doubts, unless he attributes complete folly to the Phrygians. It is told regarding this horse how the best warriors of the Greeks lay hidden inside, and the bronze work itself reflects this very arrangement. Menestheus and Teucer are depicted peering out of it, as well as the sons of Theseus.