Revelation 9:11

They have over them, as king, the messenger of the abyss, whose name, in Hebrew, is Abaddon "=Destroyer", and, in the Greek, he hath for name, Destroyer.

Ephesians 2:2

In which at one time ye walked, according to the age of the world, according to the prince of the authority of the air, of the spirit that now energiseth in the sons of disobedience,

Job 26:6

Naked is hades before him, and there is no covering to destruction;

John 8:44

Ye, are, of your father - the adversary, and, the covetings of your father, ye choose to be doing. He, was, a murderer, from the beginning, and, in the truth, he stood not; because truth is not in him: Whensoever he speaketh falsehood, of his own, he speaketh; because, false, he is, and, the father of it.

John 12:31

Now, is there, a judging, of this world, - Now, the ruler of this world, shall be cast out;

John 14:30

No longer, many things, will I speak with you; for, the world's ruler, is coming, and, in me, hath, nothing, -

John 16:11

And, concerning judgment, because, the ruler of this world, hath been judged.

2 Corinthians 4:4

In whom, the god of this age, hath blinded the minds of the unbelieving, to the end they may not discern the radiance e of the glad-message of the glory of the Christ - who is the image of God.

1 John 4:4

Ye, are, of God, dear children, and have overcome them; because, greater, is he that is in you, than he that is in the world.

1 John 5:19

We know that, of God, are we; and, the whole world, in the wicked one, is lying.

Revelation 9:1-2

And, the fifth messenger, sounded; and I saw a star, out of heaven, fallen unto the earth, and there was given unto him the key of the shaft of the abyss.

Revelation 12:9

And the great dragon was cast out, - the ancient serpent, he that is called Adversary and the Satan, that deceiveth the whole habitable world, - he was cast to the earth, and his messengers, with him, were cast.

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
And the great dragon was cast out, - the ancient serpent, he that is called Adversary and the Satan, that deceiveth the whole habitable world, - he was cast to the earth, and his messengers, with him, were cast.
John 12:31
Now, is there, a judging, of this world, - Now, the ruler of this world, shall be cast out;
John 14:30
No longer, many things, will I speak with you; for, the world's ruler, is coming, and, in me, hath, nothing, -
John 16:11
And, concerning judgment, because, the ruler of this world, hath been judged.
2 Corinthians 4:4
In whom, the god of this age, hath blinded the minds of the unbelieving, to the end they may not discern the radiance e of the glad-message of the glory of the Christ - who is the image of God.
Ephesians 2:2
In which at one time ye walked, according to the age of the world, according to the prince of the authority of the air, of the spirit that now energiseth in the sons of disobedience,
1 John 4:4
Ye, are, of God, dear children, and have overcome them; because, greater, is he that is in you, than he that is in the world.
1 John 5:19
We know that, of God, are we; and, the whole world, in the wicked one, is lying.

The angel

Revelation 9:1
And, the fifth messenger, sounded; and I saw a star, out of heaven, fallen unto the earth, and there was given unto him the key of the shaft of the abyss.

Abaddon

John 8:44
Ye, are, of your father - the adversary, and, the covetings of your father, ye choose to be doing. He, was, a murderer, from the beginning, and, in the truth, he stood not; because truth is not in him: Whensoever he speaketh falsehood, of his own, he speaketh; because, false, he is, and, the father of it.