Revelation 9:9

King James 3 - The Literal Traslation

And they had breastplates like iron breastplates; and the sound of their wings was like the sound of chariots with many horses running into battle.

Cross References

Job 39:25

When the rams’ horn sounds, he says, Aha! And he smells the battle from a distance, the thunder of the captains, and the shouting.

Job 40:18

his bones are like tubes of bronze; his bones like bars of iron;

Isaiah 9:5

For every boot of the one trampling is with shaking, and war-garments rolled in blood, even it shall be for burning, fuel for the fire.

Jeremiah 47:3

At the noise of the stamping of the hooves of his strong horses, at the rushing of his chariots, the rumbling of his wheels; the fathers shall not look back to their sons, because of sinking of hands;

Revelation 9:17

And so I saw in the vision the horses, and the ones sitting on them, having fiery red breastplates, and hyacinth blue and sulfur-like yellow; and the heads of the horses as heads of lions; and out of their mouths come fire and smoke and brimstone.