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
inf. ao. Moy. de ἀλεύω.
ἀλεύασθαι: эп. inf. aor. к ἀλεύω.
