Oecumenius

And Death and Hades were thrown into the lake of fire, this is the second death. And Death and Hades, he says, were cast into the lake of fire; that is, the death and the immortal and incorporeal life of souls in the manner of death was taken away, once having been the resurrection and each soul receiving its own body; which, explaining more figuratively and hinting at their destruction, he said that Death and Hades were thrown into the lake of fire. This is also what the prophet Hosea does, saying: "Where is your justice, O Death? …

Commentary on Revelation ↗

Augustine of Hippo

There is also a total death for a person, a death of body and soul, namely, when a soul, abandoned by God, abandons the body. In this case, the soul has no life from God and the body no life from the soul. The consequence of such total death is the second death, so called on the authority of divine Revelation. …

City of God 13.2 ↗

Alcuin of York

QUESTION: And death and hell were cast into the pool of fire, and whosoever was not found written in the book of life. ANSWER: That is, whosoever was not judged by God as being alive. Whence it seems to me that the right interpretation for the books opened above is rather that of those who interpret them as being every single person's conscience and works being disclosed, and interpret the book of life as being God's foreknowledge, which cannot be mistaken concerning those who will be given eternal life, since they are written in …

Questions And Answers Manual On Revelation ↗