Who formerly were disobedient, when once the longsuffering of God waited in the days of Noah, while the ark was being prepared, by which a few, that is, eight souls were saved through water.
All Commentaries on 1 Peter 3:20 Go To 1 Peter 3
Cyprian of Carthage
AD 258
"In the ark "says he, "of Noah, few, that is, eight souls, were saved by water, as also baptism shall in like manner save you.".
Peter also, showing this, set forth that the Church is one, and that only they who are in the Church can be baptized; and said, "In the ark of Noah, few, that is, eight souls, were saved by water; the like figure where-unto even baptism shall save you; "