Hebrews 12:28-29

Therefore receiving an unshaken kingdom, let us have grace, through which we may worship God acceptably with reverence and fear:

Revelation 1:17

And when I saw him, I fell at his feet like a dead man; and he laid his right hand on me, saying, Fear not; I am the first and the last:

Revelation 15:4

Who may not fear, O Lord, and will not glorify thy name? because thou alone art holy; because all the nations shall come and worship before thee; because thy righteous acts have been made manifest.

Treasury of Scripture Knowledge

Summary

But David could not go before it to inquire of God: for he was afraid because of the sword of the angel of the LORD.

Bible References

He was afraid

Hebrews 12:28
Therefore receiving an unshaken kingdom, let us have grace, through which we may worship God acceptably with reverence and fear:
Revelation 1:17
And when I saw him, I fell at his feet like a dead man; and he laid his right hand on me, saying, Fear not; I am the first and the last:
Revelation 15:4
Who may not fear, O Lord, and will not glorify thy name? because thou alone art holy; because all the nations shall come and worship before thee; because thy righteous acts have been made manifest.