1 Peter 3:19

In it Enoch went and preached even to those spirits that were in prison,

1 Peter 4:6

This is why the good news was preached to the dead also, that though they are judged in their physical nature as men are, they may yet live, like God, in the Spirit.

1 Peter 1:11-12

trying to learn for what possible time the spirit of Christ within them in predicting the sufferings destined for Christ intended them and the glories that were to follow them.

Revelation 19:10

I fell at his feet to worship him, but he said to me, "You must not do that. I am only a fellow-slave of yours and of your brothers who have accepted the testimony of Jesus. Worship God! For the testimony of Jesus is what inspires prophecy."

Revelation 20:7

When the thousand years are over, Satan will be released from his prison,

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
trying to learn for what possible time the spirit of Christ within them in predicting the sufferings destined for Christ intended them and the glories that were to follow them.
1 Peter 4:6
This is why the good news was preached to the dead also, that though they are judged in their physical nature as men are, they may yet live, like God, in the Spirit.
Revelation 19:10
I fell at his feet to worship him, but he said to me, "You must not do that. I am only a fellow-slave of yours and of your brothers who have accepted the testimony of Jesus. Worship God! For the testimony of Jesus is what inspires prophecy."

In

Revelation 20:7
When the thousand years are over, Satan will be released from his prison,