Passage 9.12.6
λέγεται δὲ ὡς καὶ τοῦ προσώπου τῷ σχήματι καὶ τῇ τοῦ παντὸς κινήσει σώματος περισσῶς δή τι ἔτερπε τὰ θέατρα· καί οἱ καὶ ᾆσμα πεποιημένον ἐστὶ ἐς προσόδιον ἐς Δῆλον τοῖς ἐπʼ Εὐρίπῳ Χαλκιδεῦσι. τοῦτόν τε οὖν ἐνταῦθα οἱ Θηβαῖοι καὶ Ἐπαμινώνδαν τὸν Πολύμνιδος ἀνέθεσαν.
It is said that by the expression of his face and the entire movement of his body he especially delighted the audience in the theater. Moreover, he composed a processional-song for the Chalcidians who dwell by the Euripus, to be sung at their procession to Delos. Here indeed the Thebans dedicated statues both of him and of Epaminondas, the son of Polymnis.