Following His crucifixion, and prior to His resurrection, Christ Jesus descended to a place in the heart of the earth known as Hades in the New Testament, or Sheol in the Old Testament.

At that time, there were two areas in Hades. One area was known as Abraham's Bosom (Paradise), and the other area was the area of the unsaved. (Luke 16: 19-26)

It was to Abraham's Bosom (Paradise) that Christ Jesus descended to proclaim victory over sin and death on the cross of Calvary as the perfect Lamb of God who takes away the sin of the world.

Abraham's Bosom (Paradise) was where Old Testament saints who had died  (people of faith in the one true and eternal God Jehovah) were held captive awaiting atonement of their sin debt.

When Christ Jesus ascended to heaven forty days after His resurrection, He took these Old Testament saints to heaven with Him (Ephesians 4:8).  Paradise is now in heaven. (2 Corinthians 12:2-4)

Jesus did not go into the area of the unrighteous dead when He descended to Hades, only into the area of the righteous dead (Abraham's Bosom: Paradise).