Revelation 9:11

they had for their king the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek his name is Apollyon.

Ephesians 2:2

in which you formerly liv'd, influenc'd by the customs of this world, and by the prince of the aerial powers, the spirits that now actuate the incredulous:

John 8:44

you, who have the devil for your father, will execute the designs of your father: he was a murderer from the beginning, and deserted the truth, since he has no love for the truth: when he lyes, he speaks like himself: for he is a lyar, and the father of a lyar.

John 12:31

now is this world condemn'd: now shall the prince of this world be cast out.

John 14:30

for the prince of the world is coming:

John 16:11

of judgment, because the prince of this world is condemn'd.

2 Corinthians 4:4

to those unbelievers, whose minds the God of this world has so blinded, that the glorious lustre of the gospel of Christ, who is the image of God, does not enlighten them.

1 John 4:4

ye are of God, my dear children, and you have overcome them: because he that is in you, is superior to him that is in the world.

1 John 5:19

we know that we are the children of God, and the rest of the world are subject to the evil spirit.

Revelation 9:1-2

And the fifth angel sounded, and I saw a star fall from heaven unto the earth: and to him was given the key of the bottomless pit.

Revelation 12:9

the great dragon was cast out, that old serpent, call'd the devil or satan, which deceiveth the whole world: he was cast down to the earth, and his angels were precipitated with him.

Treasury of Scripture Knowledge

Summary

And they had a king over them, which is the angel of the bottomless pit, whose name in the Hebrew tongue is Abaddon, but in the Greek tongue hath his name Apollyon.

The angel

Abaddon

Bible References

They had

Revelation 12:9
the great dragon was cast out, that old serpent, call'd the devil or satan, which deceiveth the whole world: he was cast down to the earth, and his angels were precipitated with him.
John 12:31
now is this world condemn'd: now shall the prince of this world be cast out.
John 14:30
for the prince of the world is coming:
John 16:11
of judgment, because the prince of this world is condemn'd.
2 Corinthians 4:4
to those unbelievers, whose minds the God of this world has so blinded, that the glorious lustre of the gospel of Christ, who is the image of God, does not enlighten them.
Ephesians 2:2
in which you formerly liv'd, influenc'd by the customs of this world, and by the prince of the aerial powers, the spirits that now actuate the incredulous:
1 John 4:4
ye are of God, my dear children, and you have overcome them: because he that is in you, is superior to him that is in the world.
1 John 5:19
we know that we are the children of God, and the rest of the world are subject to the evil spirit.

The angel

Revelation 9:1
And the fifth angel sounded, and I saw a star fall from heaven unto the earth: and to him was given the key of the bottomless pit.

Abaddon

John 8:44
you, who have the devil for your father, will execute the designs of your father: he was a murderer from the beginning, and deserted the truth, since he has no love for the truth: when he lyes, he speaks like himself: for he is a lyar, and the father of a lyar.