They had breastplates like breastplates of iron, and the sound of their wings was like the roar of many horse-drawn chariots rushing into battle.
In context
7In appearance the locusts were like horses equipped for battle. On their heads were what looked like crowns of gold, and their faces were like human faces. 8Their hair was like women’s hair, and their teeth were like lions’ teeth. 9They had breastplates like breastplates of iron, and the sound of their wings was like the roar of many horse-drawn chariots rushing into battle. 10They have tails with stingers, like scorpions, and in their tails is their power to harm people for five months. 11As king over them they have the angel of the abyss, whose name in Hebrew is Abaddon, and in Greek his name is Apollyon.