Jesus Christ descents into hell.
Acts 2:29-31 King James Version
29 Men and brethren, let me freely speak unto you of the patriarch David, that he is both dead and buried, and his sepulchre is with us unto this day.
30 Therefore being a prophet, and knowing that God had sworn with an oath to him, that of the fruit of his loins, according to the flesh, he would raise up Christ to sit on his throne;
31 He seeing this before spake of the resurrection of Christ, that his soul was not left in hell, neither his flesh did see corruption.
Ephesians 4:8-10 King James Version
8 Wherefore he saith, When he ascended up on high, he led captivity captive, and gave gifts unto men.
9 (Now that he ascended, what is it but that he also descended first into the lower parts of the earth?
10 He that descended is the same also that ascended up far above all heavens, that he might fill all things.)
1 Peter 3:18-20 King James Version
18 For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:
19 By which also he went and preached unto the spirits in prison;
20 Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was a preparing, wherein few, that is, eight souls were saved by water.
Apocryphal
Gospel of Bartholomew (Questions of Bartholomew) 1:7-9, 20, 29 - (Apocryphal)
7 I beheld, and I saw thee that thou wast vanished away from the cross and I heard only a voice in the parts under the earth, and great wailing and gnashing of teeth on a sudden. Tell me, Lord, whither wentest thou from the cross? 8 And Jesus answered and said: Blessed art thou, Bartholomew, my beloved, because thou sawest this mystery, and now will I tell thee all things whatsoever thou askest me.
9 For when I vanished away from the cross, then went I down into Hades that I might bring up Adam and all them that were with him, according to the supplication of Michael the archangel.
20 Then did I enter in and scourged him and bound him with chains that cannot be loosed, and brought forth thence all the patriarchs and came again unto the cross.
29 And Bartholomew answered and said unto Jesus: Lord, what is the sacrifice which is offered in paradise? And Jesus said: There be souls of the righteous which to-day have departed out of the body and go unto paradise, and unless I be
