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
(see also: ἀναπράσσω) exact
exigere, to demand, 2.95.1, 8.107.1.
