Revelation 20:1

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

Revelation 1:18

the living one, and I was dead; and, behold, I am alive unto the ages of the ages, and I have the keys of death and of Hades.

Revelation 10:1

And I saw another mighty angel coming down out of the heaven, encircled 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

And he continued to intreat Him that He should not command them to depart into the abyss.

2 Peter 2:4

For if God spared not the angels who sinned, but having sent them down to hell, committed them to chains of darkness to be kept unto judgment;

Jude 1:6

and the angels who kept not their first estate, but left their own habitation, has he kept in eternal chains unto darkness unto the judgment of the great day:

Revelation 9:1-2

And the fifth angel sounded; and I saw a star having fallen from the heaven to the earth; and the key of the pit of the abyss was given to him.

Revelation 18:1

After these things I saw another angel coming down out of the heaven, having great authority; and the earth was lighted 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 coming down out of the heaven, encircled 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 these things I saw another angel coming down out of the heaven, having great authority; and the earth was lighted with his glory.

Having

Revelation 1:18
the living one, and I was dead; and, behold, I am alive unto the ages of the ages, and I have the keys of death and of Hades.
Revelation 9:1
And the fifth angel sounded; and I saw a star having fallen from the heaven to the earth; and the key of the pit of the abyss was given to him.
Luke 8:31
And he continued to intreat Him that He should not command them to depart into the abyss.

A great

2 Peter 2:4
For if God spared not the angels who sinned, but having sent them down to hell, committed them to chains of darkness to be kept unto judgment;
Jude 1:6
and the angels who kept not their first estate, but left their own habitation, has he kept in eternal chains unto darkness unto the judgment of the great day:

General references

Matthew 8:31
And the demons continued to intreat him, saying, If you cast us out, permit us to depart into the herd of swine.
Matthew 12:29
Or how is any one able to enter into the house of a strong man, and spoil his goods, unless he may first bind the strong man, and then he can spoil his house.
Mark 3:27
No one is able, having entered into the house of a strong man, to spoil his goods, unless he may first bind the strong man, and then he will spoil his house.
Luke 11:22
but when one stronger than he, having come, may conquer him, he takes away his panoply in which he trusted, and divides his spoils.