σύμμετρος γὰρ ὡς κλύειν

From LSJ

Σοφὸς γὰρ οὐδείς, ὃς τὰ πάντα προσκοπεῖ → Omnia vel sapiens nemo est, qui prospexerit → Denn keinen Weisen gibt's, der alles sieht vorher

Menander, Monostichoi, 486

Greek > English (Woodhouse)

he is within earshot

English > Greek (Woodhouse Quotes Reversed)

he is within range of hearing