Offenbarung 9:9

und hatten Panzer wie eiserne Panzer, und das Rasseln ihrer Flügel wie das Rasseln an den Wagen vieler Rosse, die in den Krieg laufen;

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.