Hebrews 10:27

nothing but an awful outlook of doom, of that burning Wrath which will consume the foes of God.

Hebrews 10:31

It is an awful thing to fall into the hands of the living God.

Revelation 6:15-17

Then the kings of the earth, the magnates, the generals, the rich, the strong, slaves and freemen everyone of them, hid in caves and among 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
nothing but an awful outlook of doom, of that burning Wrath which will consume the foes of God.
Revelation 6:15
Then the kings of the earth, the magnates, the generals, the rich, the strong, slaves and freemen everyone of them, hid in caves and among the rocks of the mountains,