Revelation 20:1

And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.

Revelation 1:18

I am he that liveth, and was dead; and behold, I am alive for evermore, Amen; and have the keys of hell and of death.

Revelation 10:1

And I saw another mighty angel come down from heaven, clothed with a cloud: and a rainbow was upon his head, and his face was as it were the sun, and his feet as pillars of fire:

Luke 8:31

And they besought him, that he would not command them to go out into the deep.

2 Peter 2:4

For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved to judgment;

Jude 1:6

And the angels who kept not their first state, but left their own habitation, he hath reserved in everlasting chains under darkness to the judgment of the great day.

Revelation 9:1-2

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

Revelation 18:1

And after these things I saw another angel come down from heaven, having great power; and the earth was lightened with his glory.

Treasury of Scripture Knowledge

Summary

And I saw an angel come down from heaven, having the key of the bottomless pit and a great chain in his hand.

Bible References

I saw

Revelation 10:1
And I saw another mighty angel come down from heaven, clothed with a cloud: and a rainbow was upon his head, and his face was as it were the sun, and his feet as pillars of fire:
Revelation 18:1
And after these things I saw another angel come down from heaven, having great power; and the earth was lightened with his glory.

Having

Revelation 1:18
I am he that liveth, and was dead; and behold, I am alive for evermore, Amen; and have the keys of hell and of death.
Revelation 9:1
And the fifth angel sounded, and I saw a star fall from heaven to the earth: and to him was given the key of the bottomless pit.
Luke 8:31
And they besought him, that he would not command them to go out into the deep.

A great

2 Peter 2:4
For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved to judgment;
Jude 1:6
And the angels who kept not their first state, but left their own habitation, he hath reserved in everlasting chains under darkness to the judgment of the great day.

General references

Matthew 8:31
So the demons besought him, saying, If thou expellest us, suffer us to go away into the herd of swine.
Matthew 12:29
Or else, how can one enter into a strong man's house, and seize his goods, except he shall first bind the strong man? and then he will plunder his house.
Mark 3:27
No man can enter into a strong man's house, and seize his goods, except he will first bind the strong man; and then he will plunder his house.
Luke 11:22
But when a stronger than he shall come upon him, and overcome him, he taketh from him all his armor in which he trusted, and divideth his spoils.