The Shepherd of Hermas (1st or 2nd Century), Vision 3, Chapter 7:
“Repentance,” said she, “is yet possible, but in this tower [Church] they cannot find a suitable place. But in another and much inferior place they will be laid, and that, too, only when they have been tortured and completed the days of their sins. And on this account will they be transferred, because they have partaken of the righteous Word. And then only will they be removed from their punishments when the thought of repenting of the evil deeds which they have done has come into their hearts. But if it does not come into their hearts, they will not be saved, on account of the hardness of their heart.”
The Shepherd of Hermas (1st or 2nd Century), Similitude 9, Chapter 28:
“Listen,” he said: “all who once suffered for the name of the Lord [in martyrdom] are honourable before God; and of all these the sins were remitted, because they suffered for the name of the Son of God.
The Acts of Paul (Mid-2nd Century) 2:28:
And after the procession Tryphaena took her again. For her daughter Falconilla, which was dead, had said to her in a dream: Mother, thou shalt take in my stead Thecla the stranger that is desolate, that she may pray for me and I be translated into the place of the righteous.
The Christian Sibylline Oracles (2nd Century) Book 2:384-387:
But the others, all to whom right and fair works
And piety and thoughts most just were dear,
Shall angels, bearing through the burning stream,
Lead unto light and life exempt from care
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Find more of what the early Christians thought on my Christian History page!