Revelation 9:9

And they had breastplates like breastplates of iron; and the noise of their wings was like the noise of chariots, and many horses rushing to war.

Treasury of Scripture Knowledge

Summary

Like the noise of chariots on the tops of mountains shall they leap, like the noise of a flame of fire that devoureth the stubble, as a strong people set in battle array.

The noise

Bible References

The noise

Revelation 9:9
And they had breastplates like breastplates of iron; and the noise of their wings was like the noise of chariots, and many horses rushing to war.