Hebrews 10:27

but a fearful expectation of judgment and fiery indignation, which is about to consume the adversaries.

Hebrews 10:31

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

Revelation 6:15-17

And the kings of the earth and the great men and the chiliarchs and the rich and the mighty and every servant and freeman hid themselves in 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 fearful expectation of judgment and fiery indignation, which is about to consume the adversaries.
Revelation 6:15
And the kings of the earth and the great men and the chiliarchs and the rich and the mighty and every servant and freeman hid themselves in caves and in the rocks of the mountains,