Regum et imperatorum apophthegmata
Plutarch
Plutarch. Moralia, Vol. III. Babbitt, Frank Cole, editor. Cambridge, MA: Harvard University Press; London: William Heinemann Ltd., 1931 (printing).
ἐπεὶ δὲ αὐτὸς ἑαυτὸν αἰκισάμενος ὁ Ζώπυρος καὶ τὴν ῥῖνα καὶ τὰ ὦτα περικόψας ἐξηπάτησε Βαβυλωνίους καὶ πιστευθεὶς ὑπʼ αὐτῶν παρέδωκε Δαρείῳ τὴν πόλιν, πολλάκις ὁ Δαρεῖος εἶπεν οὐκ ἂν ἐθελῆσαι λαβεῖν ἑκατὸν Βαβυλῶνας ἐπὶ τῷ μὴ Ζώπυρον ἔχειν ὁλόκληρον.