Luke 12:5

But I will show you whom you shall fear: Fear him who, after he has killed, has authority to cast into hell; yes, I say to you, Fear him.

Revelation 15:4

Who will not fear thee, Lord, and glorify thy name? For thou alone art holy; for all nations shall come and worship before thee: because thy judgments are made manifest.

Treasury of Scripture Knowledge

Summary

For the LORD is great, and greatly to be praised: he is to be feared above all gods.

Bible References

He is

Luke 12:5
But I will show you whom you shall fear: Fear him who, after he has killed, has authority to cast into hell; yes, I say to you, Fear him.
Revelation 15:4
Who will not fear thee, Lord, and glorify thy name? For thou alone art holy; for all nations shall come and worship before thee: because thy judgments are made manifest.