Joel 2:2-4

Amplified Bible

² 
A day of darkness and gloom,
A day of clouds and of thick [dark] mist,
Like the dawn spread over the mountains;
There is a [pagan, hostile] people numerous and mighty,
The like of which has never been before
Nor will be again afterward
Even for years of many generations.
³ 
Before them a fire devours,
And behind them a flame burns;
Before them the land is like the Garden of Eden,
But behind them a desolate wilderness;
And nothing at all escapes them.
⁴ 
Their appearance is like the appearance of horses,
And they run like war horses.