Treasury of Scripture Knowledge

Summary

And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots of many horses running to battle.

Bible References

They had

Revelation 9:17
And in this way I saw the horses in the vision, and those seated on them, who had fiery [red] and hyacinth-colored and sulphurous [yellow] breastplates, and the heads of the horses [were] like the heads of lions, and out of their mouths came fire and smoke and sulphur.
Job 40:18
Its bones [are] tubes of copper, its limbs like rods of iron.
Job 41:23
Its flesh's folds of skin cling together; it is cast on it--it will not be moved.
Joel 2:8
They do not jostle {one another}; each goes on its own trail; and through the falling weapons, they are not halted.

And the

Job 39:25
{Whenever} a horn [sounds], it says, 'Aha!' And it smells [the] battle from a distance-- [the] thunder of [the] commanders and [the] war cry.
Isaiah 9:5
For every boot {that marches and shakes the earth} and garment rolled in blood {will} be for burning--fire fuel.
Joel 2:5
like [the] sound of chariots on the tops of the mountains, they leap about; like [the] sound of a flame of fire devouring stubble; like a strong army arranged in rows [for] battle.
Nahum 2:4
The chariots race madly through the streets; they rush back and forth in the public squares. Their appearance like lightning bolts, they dart about like flashes of lightning.