'Hoofbeats' in the Bible

Sisera’s mother looked through the window;she peered through the lattice, crying out:“Why is his chariot so long in coming?Why don’t I hear the hoofbeats of his horses?”

Fathers will hear the hoofbeats of the enemies' horses, the clatter of their chariots and the rumbling of their wheels. They will not turn back to save their children because they will be paralyzed with fear.