Revelation 9:10-12

Young's Literal Translation

¹⁰ and they have tails like to scorpions, and stings were in their tails; and their authority [is] to injure men five months;

¹¹ and they have over them a king -- the messenger of the abyss -- a name [is] to him in Hebrew, Abaddon, and in the Greek he hath a name, Apollyon.

¹² The first wo did go forth, lo, there come yet two woes after these things.