Joel 2:6
"Before their face the people shall be much pained: all faces shall gather blackness."Joel 2:6 (KJV)
Context from Joel 2
4
The appearance of them is as the appearance of horses; and as horsemen, so shall they run.
5
Like the noise of chariots on the tops of mountains shall they leap, like the noise of a flame of fire that devoureth the stubble, as a strong people set in battle array.
6
Before their face the people shall be much pained: all faces shall gather blackness.
7
They shall run like mighty men; they shall climb the wall like men of war; and they shall march every one on his ways, and they shall not break their ranks:
8
Neither shall one thrust another; they shall walk every one in his path: and when they fall upon the sword, they shall not be wounded.