Eusebius of Caesarea

It is surely the very climax of affliction to have no helper. For Christ went for the salvation of the souls in hades that had so long awaited his arrival. He went down to shatter the gates of brass, and to break the iron bonds and to let them go free that before were prisoners in hades, which was indeed done, when many bodies of the saints that slept arose and entered with him into the true holy city of God.