The Encyclical Epistle Of The Church At Smyrna Concerning The Martyrdom Of The Holy Polycarp Disciple of John the apostle, 65-100-155 AD
And, looking to the grace of Christ, they despised all the torments of this world,
redeeming themselves from eternal punishment by [the suffering of] a single hour. For this reason the fire of their savage executioners appeared cool to them. For they kept before their view
escape from that fire which is eternal and never shall be quenched,
But Polycarp said, “Thou threatenest me with fire which burneth for an hour, and after a little is extinguished, but art ignorant of
the fire of the coming judgment and of eternal punishment, reserved for the ungodly.
ANF01. The Apostolic Fathers with Justin Martyr and Irenaeus | Christian Classics Ethereal Library
The Epistle Of Ignatius To The Ephesians Disciple of John the Apostle. 30-107 AD
Do not err, my brethren. Those that corrupt families
shall not inherit the kingdom of God. And if those that corrupt mere human families are condemned to death, how
much more shall those suffer everlasting punishment who endeavor to corrupt the Church of Christ, for which the Lord Jesus, the only-begotten Son of God, endured the cross, and submitted to death! Whosoever, “being waxen fat,” and “become gross,”
sets at nought His doctrine, shall go into hell.
ANF01. The Apostolic Fathers with Justin Martyr and Irenaeus | Christian Classics Ethereal Library
The Epistle Of Barnabas 100 AD
Chapter 20 The Way Of Darkness
But the way of darkness is crooked, and full of cursing; for it is the way of
eternal death with punishment, in which way are the things that destroy the soul, viz., idolatry, over-confidence, the arrogance of power, hypocrisy, double-heartedness, adultery, murder, rapine, haughtiness, transgression, deceit, malice, self-sufficiency, poisoning, magic, avarice, want of the fear of God.
ANF01. The Apostolic Fathers with Justin Martyr and Irenaeus | Christian Classics Ethereal Library
The First Apology Of Justin 110-165 AD
Chapter 1
[...]we say that the same thing will be done, but at the hand of Christ, and upon the wicked in the same bodies 297 united again to their spirits which are now to
undergo everlasting punishment; and not only, as Plato said, for a period of a thousand years.
Chapter 12
Christians Live As Under God’s Eye
we hold this view, that it is alike impossible for the wicked, the covetous, the conspirator, and for the virtuous, to escape the notice of God, and that
each man goes to everlasting punishment or salvation according to the value of his actions. For if all men knew this, no one would choose wickedness even for a little, knowing that
he goes to the everlasting punishment of fire;
we believe (or rather, indeed, are persuaded) that
every man will suffer punishment in eternal fire according to the merit of his deed, and will render account according to the power he has received from God,
Chapter 18
Proof Of Immortality And The Resurrection
For reflect upon the end of each of the preceding kings, how they died the death common to all, which, if it issued in insensibility, would be a god send to all the wicked. But since
sensation remains to all who have ever lived, and eternal punishment is laid up (i.e., for the wicked), see that ye neglect not to be convinced, and to hold as your belief, that these things are true.
“Fear not them that kill you, and after that can do no more; but
fear Him who after death is able to cast both soul and body into hell.” And hell is a place where those are to be punished who have lived wickedly, and who do not believe that those things which God has taught us by Christ will come to pass.
Chapter 22 And we have learned that
those only are deified who have lived near to God in holiness and virtue; and we believe that
those who live wickedly and do not repent are punished in everlasting fire.
Chapter 28
God’s Care For Men
For among us the prince of the wicked spirits is called the serpent, and Satan, and the devil, as you can learn by looking into our writings. And that
he would be sent into the fire with his host, and the men who follow him, and would be punished for an endless duration, Christ foretold.
Chapter 45
And if you also read these words in a hostile spirit, ye can do no more, as I said before, than kill us; which indeed does no harm to us, but to you and all who unjustly hate us, and
do not repent, brings eternal punishment by fire.
Chapter 52
He shall come from heaven with glory, accompanied by His angelic host, when also He shall raise the bodies of all men who have lived, and
shall clothe those of the worthy with immortality, and
shall send those of the wicked, endued with eternal sensibility, into everlasting fire with the wicked devils. And that these things also have been foretold as yet to be, we will prove. By Ezekiel the prophet it was said: “Joint shall be joined to joint, and bone to bone, and flesh shall grow again; and every knee shall bow to the Lord, and every tongue shall confess Him.” And
in what kind of sensation and punishment the wicked are to be, hear from what was said in like manner with reference to this; it is as follows: “Their worm shall not rest, and their fire shall not be quenched;” and
then shall they repent, when it profits them not.
ANF01. The Apostolic Fathers with Justin Martyr and Irenaeus | Christian Classics Ethereal Library