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.

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 10:1

Then I saw another mighty angel coming down from heaven, wrapped in a cloud, with a rainbow over his head; and his face was like the sun, and his legs like pillars of fire.

Luke 8:31

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

2 Peter 2:4

For if God did not spare angels when they sinned, but cast them into hell and committed them to pits of darkness, to be reserved for judgment;

Jude 1:6

And the angels who did not keep their own domain, but abandoned their proper abode, he has kept in eternal chains under darkness for the judgment of the great day,

Revelation 9:1-2

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 18:1

After this I saw another angel coming down from heaven, having great authority; and the earth was made bright with his splendor.

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
Then I saw another mighty angel coming down from heaven, wrapped in a cloud, with a rainbow over his head; and his face was like the sun, and his legs like pillars of fire.
Revelation 18:1
After this I saw another angel coming down from heaven, having great authority; and the earth was made bright with his splendor.

Having

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 9:1
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.
Luke 8:31
And they begged him repeatedly not to command them to go into the Abyss.

A great

2 Peter 2:4
For if God did not spare angels when they sinned, but cast them into hell and committed them to pits of darkness, to be reserved for judgment;
Jude 1:6
And the angels who did not keep their own domain, but abandoned their proper abode, he has kept in eternal chains under darkness for the judgment of the great day,

General references

Matthew 8:31
And the demons begged him, "If you cast us out, send us away into the herd of swine."
Matthew 12:29
Or how can one enter a strong man's house and plunder his goods, unless he first binds the strong man? And then he will plunder his house.
Mark 3:27
No one can enter a strong man's house and plunder his goods, unless he first binds the strong man. And then he will plunder his house.
Luke 11:22
But when one stronger than he attacks him and overpowers him, he takes away his armor in which he trusted, and divides his spoils.