Revelation 9:9 They had breast-plates which seemed to be made of steel; and the noise caused by their wings was like that of a vast number of horses and chariots hurrying into battle. (WEY WBS)
Revelation 9:17 And thus I saw the horses in the vision, and them that sat on them, having breast-plates of fire, and of jacinth, and brimstone: and the heads of the horses were as the heads of lions: and out of their mouths issued fire, and smoke, and brimstone. (WBS)