Revelation 9:1

And the fifth angel sounded his trumpet, and I saw a star which had fallen from heaven to earth; and he was given the key of the shaft of the bottomless pit.

Revelation 8:10

The third angel sounded his trumpet, and a great star fell from heaven, blazing like a torch, and it fell on a third of the rivers and on the springs of water.

Luke 8:31

And they begged him repeatedly not to command them to go into the Abyss.

Revelation 1:18

and the Living One; I was dead, and behold, I am alive for evermore! And I have the keys of death and Hades.

Revelation 9:2

He opened the bottomless pit, and smoke went up from the pit, like the smoke of a great furnace; and the sun and the air were darkened by the smoke from the pit.

Luke 10:18

And he said to them, "I saw Satan fall like lightning from heaven.

Romans 10:7

or "Who will descend into the abyss?" (that is, to bring Christ up from the dead).

Revelation 17:8

The beast that you saw was, and is not, and is about to come up out of the abyss and go to destruction. And those who dwell on the earth, whose names have not been written in the book of life from the foundation of the world, will wonder when they see the beast, because he was and is not and will come.

Revelation 20:1

Then I saw an angel coming down from heaven, holding in his hand the key of the abyss and a great chain.

2 Thessalonians 2:3-8

Let no one deceive you in any way; for that day will not come, unless the rebellion comes first, and the man of lawlessness is revealed, the son of destruction,

2 Timothy 3:1-5

But understand this, that in the last days there will come times of stress.

Revelation 1:20

The mystery of the seven stars which you saw in my right hand, and the seven golden lampstands: the seven stars are the angels of the seven churches, and the seven lampstands are the seven churches.

Revelation 8:2

And I saw the seven angels who stand before God, and to them were given seven trumpets.

Revelation 8:6-8

The seven angels who had the seven trumpets prepared to sound them.

Revelation 8:12

The fourth angel sounded his trumpet, and a third of the sun was struck, a third of the moon, and a third of the stars, so that a third of them darkened. And a third of the day was without light, and also a third of the night.

Revelation 9:11-13

They have as king over them the angel of the abyss; his name in Hebrew is Abaddon, and in Greek he has the name Apollyon.

Revelation 11:14-15

The second woe has passed; behold, the third woe is coming soon.

Revelation 20:10

And the devil who had deceived them was thrown into the lake of fire and sulfur where the beast and the false prophet were, and they will be tormented day and night for ever and ever.

Treasury of Scripture Knowledge

Summary

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.

Bible References

The fifth

Revelation 9:12
The first woe is past; behold, two woes are still to come.
Revelation 8:6
The seven angels who had the seven trumpets prepared to sound them.
Revelation 11:14
The second woe has passed; behold, the third woe is coming soon.

A star

Revelation 1:20
The mystery of the seven stars which you saw in my right hand, and the seven golden lampstands: the seven stars are the angels of the seven churches, and the seven lampstands are the seven churches.
Revelation 8:10
The third angel sounded his trumpet, and a great star fell from heaven, blazing like a torch, and it fell on a third of the rivers and on the springs of water.
Luke 10:18
And he said to them, "I saw Satan fall like lightning from heaven.
2 Thessalonians 2:3
Let no one deceive you in any way; for that day will not come, unless the rebellion comes first, and the man of lawlessness is revealed, the son of destruction,
2 Timothy 3:1
But understand this, that in the last days there will come times of stress.

To him

Revelation 1:18
and the Living One; I was dead, and behold, I am alive for evermore! And I have the keys of death and Hades.
Revelation 20:1
Then I saw an angel coming down from heaven, holding in his hand the key of the abyss and a great chain.