Plutarch, De capienda ex inimicis utilitate, chapter, section 3 11:

καὶ μὴν τοὺς περὶ τὸν Διόνυσον τεχνίτας ὁρῶμεν ἐκλελυμένους καὶ ἀπροθύμους καὶ οὐκ ἀκριβῶς πολλάκις ἀγωνιζομένους ἐν τοῖς θεάτροις ἐφ ἑαυτῶν:??