1 Peter 3:19

by which he went with guardian spirits to preach to

1 Peter 4:6

for to this end was the gospel preach'd to those, who are now dead, that after having suffer'd the loss of this frail life from men, they might enjoy an immortal life with God.

1 Peter 1:11-12

when the spirit of Christ inform'd the minds of the prophets of his future sufferings, and of the glorious consequences, they were solicitous to know the circumstances of the times pointed at:

Revelation 19:10

then I fell at his seet to worship him: but he said to me, "forbear: I am the servant of God, as you and your brethren are, that bear testimony to Jesus: worship God: for to give testimony to Jesus, is the very design of prophecy."

Revelation 20:7

When the thousand years are expired, Satan shall be loosed out of 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
when the spirit of Christ inform'd the minds of the prophets of his future sufferings, and of the glorious consequences, they were solicitous to know the circumstances of the times pointed at:
1 Peter 4:6
for to this end was the gospel preach'd to those, who are now dead, that after having suffer'd the loss of this frail life from men, they might enjoy an immortal life with God.
Revelation 19:10
then I fell at his seet to worship him: but he said to me, "forbear: I am the servant of God, as you and your brethren are, that bear testimony to Jesus: worship God: for to give testimony to Jesus, is the very design of prophecy."

In

Revelation 20:7
When the thousand years are expired, Satan shall be loosed out of his prison,