Hebrews 12:28-29

since then we are entring into a kingdom which cannot be changed, let us maintain the divine favour, whereby we may serve God acceptably, with reverence and fear.

Revelation 1:17

as soon as I saw him, I fell at his feet as dead: but he laid his right hand upon me, and said, "Fear not; I am the first and the last:

Revelation 15:4

who will not fear thee, O Lord, and glorify thy name? for thou only art holy: and all nations shall come to adore thee; because thy judgments have been display'd."

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
since then we are entring into a kingdom which cannot be changed, let us maintain the divine favour, whereby we may serve God acceptably, with reverence and fear.
Revelation 1:17
as soon as I saw him, I fell at his feet as dead: but he laid his right hand upon me, and said, "Fear not; I am the first and the last:
Revelation 15:4
who will not fear thee, O Lord, and glorify thy name? for thou only art holy: and all nations shall come to adore thee; because thy judgments have been display'd."