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
subs.
P. and V. χειρόμακτρον τό (Xen. and Soph., Frag.), Ar. ἡμιτύβιον, τό.
