The Catechism in Questions & Answers

536. Are there any references to life after death in Holy Scripture?

A life after physical death is already suggested in the Old Testament. In the New Testament it is attested on several occasions. For example, we read as follows in 1 Peter 3: 19-20: “By whom [the Holy Spirit] also He [Jesus Christ] went and preached to the spirits in prison, who formerly were disobedient, when once the Divine longsuffering waited in the days of Noah, while the ark was being prepared, in which a few, that is, eight souls, were saved through water.”