Revelation 9:1

The fifth angel sounded, and I saw a star from the sky which had fallen to the earth. The key to the pit of the abyss was given to him.

Revelation 8:10

The third angel sounded, and a great star fell from the sky, burning like a torch, and it fell on one third of the rivers, and on the springs of the waters.

Luke 8:31

They begged him that he would not command them to go into the abyss.

Revelation 1:18

and the Living one. I was dead, and behold, I am alive forevermore. Amen. I have the keys of Death and of Hades.

Revelation 9:2

He opened the pit of the abyss, and smoke went up out of the pit, like the smoke from a burning furnace. The sun and the air were darkened because of the smoke from the pit.

Luke 10:18

He said to them, "I saw Satan having fallen 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 to go into destruction. Those who dwell on the earth and whose names have not been written in the book of life from the foundation of the world will marvel when they see that the beast was, and is not, and shall be present.

Revelation 20:1

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

Isaiah 14:12

How you have fallen from heaven, morning star, son of the dawn! How you are cut down to the ground, who laid the nations low!

2 Thessalonians 2:3-8

Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction,

2 Timothy 3:1-5

But know this, that in the last days, grievous times will come.

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 assemblies. The seven lampstands are seven assemblies.

Revelation 8:2

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

Revelation 8:6-8

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

Revelation 8:12

The fourth angel sounded, and one third of the sun was struck, and one third of the moon, and one third of the stars; so that one third of them would be darkened, and the day wouldn't shine for one third of it, and the night in the same way.

Revelation 9:11-13

They have over them as king the angel of the abyss. His name in Hebrew is "Abaddon," but in Greek, he has the name "Apollyon."

Revelation 11:14-15

The second woe is past. Behold, the third woe comes quickly.

Revelation 20:10

The devil who deceived them was thrown into the lake of fire and sulfur, where the beast and the false prophet are also. They will be tormented day and night forever 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, there are still two woes coming after this.
Revelation 8:6
The seven angels who had the seven trumpets prepared themselves to sound.
Revelation 11:14
The second woe is past. Behold, the third woe comes quickly.

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 assemblies. The seven lampstands are seven assemblies.
Revelation 8:10
The third angel sounded, and a great star fell from the sky, burning like a torch, and it fell on one third of the rivers, and on the springs of the waters.
Isaiah 14:12
How you have fallen from heaven, morning star, son of the dawn! How you are cut down to the ground, who laid the nations low!
Luke 10:18
He said to them, "I saw Satan having fallen like lightning from heaven.
2 Thessalonians 2:3
Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction,
2 Timothy 3:1
But know this, that in the last days, grievous times will come.

To him

Revelation 1:18
and the Living one. I was dead, and behold, I am alive forevermore. Amen. I have the keys of Death and of Hades.
Revelation 20:1
I saw an angel coming down out of heaven, having the key of the abyss and a great chain in his hand.