Revelation 9:9-11

9They had breastplates like breastplates of iron, and the sound of their wings was like the thundering of many horses and chariots rushing into battle. 10They had tails with stingers, like scorpions, and in their tails they had power to torment people for five months.

11They had as king over them the angel of the Abyss, whose name in Hebrew is Abaddon and in Greek is Apollyon (that is, Destroyer).