John 12:28-29

Father, honor thine own name." At this there came a voice from Heaven, which said: "I have already honored it, and I will honor it again."

Hebrews 12:18-19

It is not to tangible 'flaming fire' that you have drawn near, nor to 'gloom, and darkness, and storm,

Revelation 10:3-4

and he cried in a loud voice like the roaring of a lion. At his cry the seven peals of thunder spoke, each with its own voice.

Treasury of Scripture Knowledge

Summary

And the sound of the cherubims' wings was heard even to the outer court, as the voice of the Almighty God when he speaketh.

Bible References

The voice

John 12:28
Father, honor thine own name." At this there came a voice from Heaven, which said: "I have already honored it, and I will honor it again."
Hebrews 12:18
It is not to tangible 'flaming fire' that you have drawn near, nor to 'gloom, and darkness, and storm,
Revelation 10:3
and he cried in a loud voice like the roaring of a lion. At his cry the seven peals of thunder spoke, each with its own voice.