Revelation 20:1

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

Revelation 1:18

the living one. I was dead, yet here I am alive forever and ever. I hold the keys of death and the underworld.

Revelation 10:1

Then I saw another mighty angel descend from heaven. He was clothed in a cloud, and a rainbow encircled his head. His face was like the sun, his legs were like pillars of fire,

Luke 8:31

And they begged him not to order them off to the bottomless pit.

2 Peter 2:4

For if God did not spare angels when they sinned, but plunged them into Tartarus, and committed them to dark dungeons to await their doom,

Jude 1:6

and the angels who neglected their responsibilities and abandoned their homes he has put in everlasting chains to be kept in darkness for the judgment of the great Day,

Revelation 9:1-2

Then the fifth angel blew his trumpet, and I saw a star that had fallen on the earth from the sky. He was given the key to the pit of the abyss,

Revelation 18:1

Afterward I saw another angel come down from heaven. He possessed great authority and his splendor lighted up the earth.

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 descend from heaven. He was clothed in a cloud, and a rainbow encircled his head. His face was like the sun, his legs were like pillars of fire,
Revelation 18:1
Afterward I saw another angel come down from heaven. He possessed great authority and his splendor lighted up the earth.

Having

Revelation 1:18
the living one. I was dead, yet here I am alive forever and ever. I hold the keys of death and the underworld.
Revelation 9:1
Then the fifth angel blew his trumpet, and I saw a star that had fallen on the earth from the sky. He was given the key to the pit of the abyss,
Luke 8:31
And they begged him not to order them off to the bottomless pit.

A great

2 Peter 2:4
For if God did not spare angels when they sinned, but plunged them into Tartarus, and committed them to dark dungeons to await their doom,
Jude 1:6
and the angels who neglected their responsibilities and abandoned their homes he has put in everlasting chains to be kept in darkness for the judgment of the great Day,

General references

Matthew 8:31
And the demons entreated him, saying, "If you are going to drive us out, send us into the drove of pigs."
Matthew 12:29
How can anyone get into a strong man's house and carry off his property unless he first binds the strong man? After that he can plunder his house.
Mark 3:27
But no one can go into a strong man's house and carry off his property unless he first binds the strong man; after that he can plunder his house.
Luke 11:22
But when somebody stronger than he attacks him and overcomes him, he strips him of the arms that he relied on, and divides up the spoils.