Revelation 1:15

and his feet like fine brass, when glowing in a furnace; and his voice as the voice of many waters;

Revelation 19:6

And I heard a sound, which was as the voice of a great multitude, and as the voice of many waters, and like the peal of mighty thunderings, saying, Hallelujah! for the Lord God, the Omnipotent, reigns!

Treasury of Scripture Knowledge

Summary

And when they went, I heard the noise of their wings, like the noise of great waters, as the voice of the Almighty, the voice of speech, as the noise of an host: when they stood, they let down their wings.

Bible References

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Revelation 1:15
and his feet like fine brass, when glowing in a furnace; and his voice as the voice of many waters;
Revelation 19:6
And I heard a sound, which was as the voice of a great multitude, and as the voice of many waters, and like the peal of mighty thunderings, saying, Hallelujah! for the Lord God, the Omnipotent, reigns!