נחום ב:ט פירוש: רש״י

And Nineveh is like a pool of water - it is since days of yore—Since the day it was founded, it has been sitting tranquilly with no one disturbing it, like a pool of gathered water that does not move from its place.

and they—Now, out of their stress, they have learned to flee and are fleeing.

Halt! Halt!—They say to them, but no one turns his heart to listen and halt.