τὸ ἐμόν γ' ἐμοὶ λέγεις ὄναρ → you are telling me what I know already, you are telling me my own dream
explanation: P. ἐξήγησις, ἡ, ἑρμηνεία, ἡ.
example: P. and V. δεῖγμα, τό, παράδειγμα, τό.