Gregory the Great — as excerpted in the Catena Aurea on Luke 16:22-26

“(lib. 4. Mor. c. 29.) Now if Abraham sate below, the rich man placed in torments would not see him. For they who have followed the path to the heavenly country, when they leave the flesh, are kept back by the gates of hell; not that punishment smites them as sinners, but that resting in some more remote places, (for the intercession of the Mediator was not yet come,) the guilt of their first fault prevents them from entering the kingdom.”