in which he also went and preached to the spirits in prison,
II. What is meant by prison here? Purgatory, or the limbus patrum, say the Romanists - a place in which departed souls are supposed to be confined, and in which their final destiny may still be effected by the purifying fires which they endure, by the prayers of the living, or by a message in some way conveyed to their gloomy abodes - in which such sins may be expiated as do not deserve eternal damnation. The Syriac here is “in Sheol,” referring to the abodes of the dead, or the place in which departed spirits are supposed to dwell. The word rendered “prison,” (φυλακῇ phulakē,) means properly “watch, guard” - the act of keeping watch, or the guard itself; then watchpost, or station; then a place where anyone is watched or guarded, as a prison; then a watch in the sense of a division of the night, as the morning watch. It is used in the New Testament, with reference to the future world, only in the following places: 1 Peter 3:19, “Preached unto the spirits in prison;” and Revelation 20:7, “Satan shall be loosed put of his prison.”