Parallel
Isaiah 18:3
Brenton's English Septuagint · Berean Standard Bible
Now all the rivers of the land shall be inhabited as an inhabited country; their land shall be as when a signal is raised from a mountain; it shall be audible as the sound of a trumpet.
All you people of the world and dwellers of the earth, when a banner is raised on the mountains, you will see it; when a ram’s horn sounds, you will hear it.