Revelation 20:1

And I saw an angel coming down out of heaven, with the key of the bottomless pit and a great chain in his hand.

Revelation 1:18

I was dead, and behold, I am alive forevermore; and hold the keys of death and of Hades.

Revelation 10:1

And I saw another mighty angel coming down out of heaven, clad with a cloud; and a rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire.

Luke 8:31

So they besought Jesus not to command them to go away into the abyss.

2 Peter 2:4

For if God did not spare angels when they sinned, but cast them down to Tartarus, and committed them to chains of darkness, and reserved them for judgment;

Jude 1:6

while the angels who did not keep their first domain but left their proper abode, are held by him in blank darkness, in everlasting chains, in preparation for the judgment of the Great Day.

Revelation 9:1-2

Then the fifth angel blew his trumpet, and I saw a star fallen from heaven upon the earth; and to him was given the key to the bottomless pit.

Revelation 18:1

After this I saw another angel coming down from heaven, who had great authority; and the earth was illumined by 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 coming down out of heaven, clad with a cloud; and a rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire.
Revelation 18:1
After this I saw another angel coming down from heaven, who had great authority; and the earth was illumined by his glory.

Having

Revelation 1:18
I was dead, and behold, I am alive forevermore; and hold the keys of death and of Hades.
Revelation 9:1
Then the fifth angel blew his trumpet, and I saw a star fallen from heaven upon the earth; and to him was given the key to the bottomless pit.
Luke 8:31
So they besought Jesus not to command them to go away into the abyss.

A great

2 Peter 2:4
For if God did not spare angels when they sinned, but cast them down to Tartarus, and committed them to chains of darkness, and reserved them for judgment;
Jude 1:6
while the angels who did not keep their first domain but left their proper abode, are held by him in blank darkness, in everlasting chains, in preparation for the judgment of the Great Day.

General references

Matthew 8:31
and the demons began entreating him. "If you are driving us out," they said, "send us into the herd of swine."
Matthew 12:29
"Or how can any one enter the strong man's house and carry off his goods without first binding the strong man? Then he can rob his house.
Mark 3:27
"Indeed, no one can enter the strong man's house and carry off his property without first binding the strong man; then he can plunder his house.
Luke 11:22
"but when the stronger man attacks him, he takes away from the strong armor in which he was trusting and divides up the spoil.