Revelation 9:11

They have over them as king the angel of the great deep: his name in Hebrew is Abaddon, and in the Greek language Apollyon.

Ephesians 2:2

In which you were living in the past, after the ways of this present world, doing the pleasure of the lord of the power of the air, the spirit who is now working in those who go against the purpose of God;

Job 26:6

The underworld is uncovered before him, and Destruction has no veil.

John 8:44

You are the children of your father the Evil One and it is your pleasure to do his desires. From the first he was a taker of life; and he did not go in the true way because there is no true thing in him. When he says what is false, it is natural to him, for he is false and the father of what is false.

John 12:31

Now is this world to be judged: now will the ruler of this world be sent out.

John 14:30

After this I will not say much to you, because the ruler of this world comes: and he has no power over me;

John 16:11

Of being judged, because the ruler of this world has been judged.

2 Corinthians 4:4

Because the god of this world has made blind the minds of those who have not faith, so that the light of the good news of the glory of Christ, who is the image of God, might not be shining on them.

1 John 4:4

You are of God, my little children, and you have overcome them because he who is in you is greater than he who is in the world.

1 John 5:19

We are certain that we are of God, but all the world is in the power of the Evil One.

Revelation 9:1-2

And at the sounding of the fifth angel I saw a star falling from heaven to the earth: and there was given to him the key of the great deep.

Revelation 12:9

And the great dragon was forced down, the old snake, who is named the Evil One and Satan, by whom all the earth is turned from the right way; he was forced down to the earth, and his angels were forced down 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
And the great dragon was forced down, the old snake, who is named the Evil One and Satan, by whom all the earth is turned from the right way; he was forced down to the earth, and his angels were forced down with him.
John 12:31
Now is this world to be judged: now will the ruler of this world be sent out.
John 14:30
After this I will not say much to you, because the ruler of this world comes: and he has no power over me;
John 16:11
Of being judged, because the ruler of this world has been judged.
2 Corinthians 4:4
Because the god of this world has made blind the minds of those who have not faith, so that the light of the good news of the glory of Christ, who is the image of God, might not be shining on them.
Ephesians 2:2
In which you were living in the past, after the ways of this present world, doing the pleasure of the lord of the power of the air, the spirit who is now working in those who go against the purpose of God;
1 John 4:4
You are of God, my little children, and you have overcome them because he who is in you is greater than he who is in the world.
1 John 5:19
We are certain that we are of God, but all the world is in the power of the Evil One.

The angel

Revelation 9:1
And at the sounding of the fifth angel I saw a star falling from heaven to the earth: and there was given to him the key of the great deep.

Abaddon

John 8:44
You are the children of your father the Evil One and it is your pleasure to do his desires. From the first he was a taker of life; and he did not go in the true way because there is no true thing in him. When he says what is false, it is natural to him, for he is false and the father of what is false.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain