Hi Song of Hannah:
In 1 Peter 3 it says this in the NWT….
For Christ died once for all time for sins,+ a righteous person for unrighteous ones,+ in order to lead you to God.+ He was put to death in the flesh+ but made alive in the spirit.+ 19 And in this state he went and preached to the spirits in prison,+ 20 who had formerly been disobedient when God was patiently waiting* in Noah’s day,+ while the ark was being constructed,+ in which a few people, that is, eight souls,* were carried safely through the water.+
So, it’s clear that Jesus was preaching to the spirits (angels) who were in Tartarus (first death for angels) who had come down to the earth in Noah’s time to cavort with human women and father children by them. Jude tells us that ….. And the angels who did not keep their original position but forsook their own proper dwelling place,+ he has reserved with eternal bonds in dense darkness for the judgment of the great day. Jude 6.
The Bible does not go in to what Jesus preached to these ones when he too was a “spirit”. Perhaps in the future in the Kingdom we may find out what Jesus said to these ones. For now we could only speculate, which is seldom truly fruitful.
Hope that helps.