Revelation 9:9

The English Standar Version

they had breastplates like breastplates of iron, and the noise of their wings was like the noise of many chariots with horses rushing into battle.

Cross References

Job 39:25

When the trumpet sounds, he says 'Aha!' He smells the battle from afar, the thunder of the captains, and the shouting.

Job 40:18

His bones are tubes of bronze, his limbs like bars of iron.

Isaiah 9:5

For every boot of the tramping warrior in battle tumult and every garment rolled in blood will be burned as fuel for the fire.

Jeremiah 47:3

At the noise of the stamping of the hoofs of his stallions, at the rushing of his chariots, at the rumbling of their wheels, the fathers look not back to their children, so feeble are their hands,

Revelation 9:17

And this is how I saw the horses in my vision and those who rode them: they wore breastplates the color of fire and of sapphire[3] and of sulfur, and the heads of the horses were like lions' heads, and fire and smoke and sulfur came out of their mouths.