The sentinel announces the attack (Isa 21: 6-21:10)

“Thus Yahweh said to me.

‘Go!

Post a lookout!

Let him announce

What he sees!

When he sees riders,

Horsemen in pairs,

Riders on donkeys,

Riders on camels,

Let him listen diligently,

Very diligently!’

Then the watcher cried out.

‘Upon a watchtower

I stand!

O Lord!

Continually by day!

At my post

I am stationed

Throughout the night.

Look!

There they come

Riders,

Horsemen in pairs!’

Then he responded.

‘Fallen!

Fallen is Babylon!

He has shattered on the ground

All the images of her gods!’

O my threshed one!

O my winnowed one!

What I have heard

From Yahweh of hosts,

The God of Israel,

I announce to you.”

Isaiah continues with what Yahweh had said to him. Yahweh wanted a lookout posted so that he could announce what he saw coming. This lookout person was to watch for riders on horses, camels, and donkeys as well as listen very carefully. He was to stand there during the day and the night. Then he saw the riders coming, as Babylon had fallen with all its gods shattered on the ground. This is what Isaiah had heard from Yahweh in his vision, as he announced this to all. The sentinel watchtower man was a main theme of the later 20th century Jehovah’s Witnesses with their Watchtower magazine.