2 Maccabees 12:44-45
For if he were not expecting that those who had fallen would rise again, it would have been superfluous and foolish to pray for the dead. But if he was looking to the splendid reward that is laid up for those who fall asleep in godliness, it was a holy and pious thought. Therefore he made atonement for the dead, that they might be delivered from their sin. (cf. 1 Cor 15:29)
1 Corinthians 3:11-15
For no other foundation can any one lay than that which is laid, which is Jesus Christ. Now if any one builds on the foundation with gold, silver, precious stones, wood, hay, straw – each man's work will become manifest; for the Day will disclose it, because it will be revealed with fire, and the fire will test what sort of work each one has done. If the work which any man has built on the foundation survives, he will receive a reward. If any man's work is burned up, he will suffer loss, though he himself will be saved, but only as through fire.
Settle with your opponent quickly while on the way to court with him.Otherwise your opponent will hand you over to the judge, and the judge will hand you over to the guard, and you will be thrown into prison. Amen, I say to you, you will not be released until you have paid the last penny. I say to you, you will never get out till you have paid the last penny.
The “prison” alluded to in verse 25 is purgatory, according to Tertullian, St Cyprian, Origen, St Ambrose, and St Jerome, while the “penny” represents the most minor sins that one commits.