Revelation 9:11 (NIV)
"They had as king over them the angel of the Abyss, whose name in Hebrew is Abaddon and in Greek is Apollyon (that is, Destroyer)."

Revelation 11:18 (NIV)
The nations were angry, and your wrath has come. The time has come for judging the dead, and for rewarding your servants the prophets and your people who revere your name, both great and small — and for destroying those who destroy the earth.”