1 Peter 3:19

By whom he went to the spirits in prison, preaching to those

1 Peter 4:6

For this was the reason why the good news of Jesus was given even to the dead, so that they might be judged as men in the flesh, but might be living before God in the spirit.

Isaiah 42:7

To give eyes to the blind, to make free the prisoners from the prison, to let out those who are shut up in the dark.

Isaiah 49:9

Saying to those who are in chains, Go free; to those who are in the dark, Come out into the light. They will get food by the way wherever they go, and have grass-lands on all the dry mountain-tops.

Isaiah 61:1

The spirit of the Lord is on me, because I am marked out by him to give good news to the poor; he has sent me to make the broken-hearted well, to say that the prisoners will be made free, and that those in chains will see the light again;

1 Peter 1:11-12

Attempting to see what sort of time the Spirit of Christ which was in them was pointing to, when it gave witness to the pains which Christ would undergo and the glories which would come after them.

Revelation 19:10

And I went on my face before his feet to give him worship. And he said to me, See you do it not: I am a brother-servant with you and with your brothers who keep the witness of Jesus: give worship to God: for the witness of Jesus is the spirit of the prophet's word.

Revelation 20:7

And when the thousand years are ended, Satan will be let loose out of his prison,

Nehemiah 9:30

Year after year you put up with them, and gave witness against them by your spirit through your prophets: still they did not give ear: and so you gave them up into the hands of the peoples of the lands.

Treasury of Scripture Knowledge

Summary

By which also he went and preached unto the spirits in prison;

Bible References

By which

1 Peter 1:11
Attempting to see what sort of time the Spirit of Christ which was in them was pointing to, when it gave witness to the pains which Christ would undergo and the glories which would come after them.
1 Peter 4:6
For this was the reason why the good news of Jesus was given even to the dead, so that they might be judged as men in the flesh, but might be living before God in the spirit.
Nehemiah 9:30
Year after year you put up with them, and gave witness against them by your spirit through your prophets: still they did not give ear: and so you gave them up into the hands of the peoples of the lands.
Revelation 19:10
And I went on my face before his feet to give him worship. And he said to me, See you do it not: I am a brother-servant with you and with your brothers who keep the witness of Jesus: give worship to God: for the witness of Jesus is the spirit of the prophet's word.

In

Isaiah 42:7
To give eyes to the blind, to make free the prisoners from the prison, to let out those who are shut up in the dark.
Isaiah 49:9
Saying to those who are in chains, Go free; to those who are in the dark, Come out into the light. They will get food by the way wherever they go, and have grass-lands on all the dry mountain-tops.
Isaiah 61:1
The spirit of the Lord is on me, because I am marked out by him to give good news to the poor; he has sent me to make the broken-hearted well, to say that the prisoners will be made free, and that those in chains will see the light again;
Revelation 20:7
And when the thousand years are ended, Satan will be let loose out of his prison,

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain