thick darkness

Exodus 20:21
And the people stood at a distance as Moses approached the thick darkness where God was.

Deuteronomy 4:11
You came near and stood at the foot of the mountain, a mountain blazing with fire to the heavens, with black clouds and deep darkness.

Deuteronomy 5:22
The LORD spoke these commandments in a loud voice to your whole assembly out of the fire, the cloud, and the deep darkness on the mountain; He added nothing more. And He wrote them on two tablets of stone and gave them to me.

Psalm 105:28
He sent darkness, and it became dark--for had they not defied His words?

Joel 2:2, 31
a day of darkness and gloom, a day of clouds and blackness. Like the dawn overspreading the mountains a great and strong people appears, such as never was of old, nor will ever be in ages to come. . . .

Amos 4:13
For behold, He who forms the mountains, who creates the wind, and reveals His thoughts to man, the One who turns the dawn to darkness and strides on the heights of the earth, the LORD, the God of Hosts, is His name."

Revelation 16:10
And the fifth angel poured out his bowl on the throne of the beast, and its kingdom was plunged into darkness, and men began to gnaw their tongues in anguish