ποταμῷ γὰρ οὐκ ἔστιν ἐμβῆναι δὶς τῷ αὐτῷ → it is impossible to step twice in the same river, you cannot step twice into the same rivers
ἐπεισδύνω: μεταγεν. ἐπεισδύω, ἐπεισέρχομαι, λανθάνει γὰρ ἐπεισδύουσα ἡ παράβασις Ἀριστ. Πόλιτικ. 5. 8, 2.
