Hebrews 10:27

But a certain fearful looking for of judgment and fiery indignation, which will devour the adversaries.

Hebrews 10:31

It is a fearful thing to fall into the hands of the living God.

Revelation 6:15-17

And the kings of the earth, and the chief captains, and the rich, and the mighty, and every slave, and every free man hid themselves in the caves, and in the rocks of the mountains:

Treasury of Scripture Knowledge

Summary

That they feared greatly, because Gibeon was a great city, as one of the royal cities, and because it was greater than Ai, and all the men thereof were mighty.

Bible References

They feared

Hebrews 10:27
But a certain fearful looking for of judgment and fiery indignation, which will devour the adversaries.
Revelation 6:15
And the kings of the earth, and the chief captains, and the rich, and the mighty, and every slave, and every free man hid themselves in the caves, and in the rocks of the mountains: