'Saved as through fire'
A purgation after death of what must be purified, or the judgment of believers' works only — tied to how traditions practise prayer for the dead.
1 Corinthians 3:10-15
10According to the grace of God which was given to me, as a wise master builder I laid a foundation, and another builds on it. But let each man be careful how he builds on it.
11For no one can lay any other foundation than that which has been laid, which is Jesus Christ.
12But if anyone builds on the foundation with gold, silver, costly stones, wood, hay, or stubble,
13each man’s work will be revealed. For the Day will declare it, because it is revealed in fire; and the fire itself will test what sort of work each man’s work is.
14If any man’s work remains which he built on it, he will receive a reward.
15If any man’s work is burned, he will suffer loss, but he himself will be saved, but as through fire.
What each tradition says
Rabbinic / Midrashic
Kohler finds the view of purgatory stated clearly in rabbinic passages. The Shammaites taught that at the last judgment there are three classes of souls: the righteous are written at once for life everlasting, the wicked for Gehenna, and those whose virtues and sins counterbalance go down to Gehenna, floating up and down until they rise purified.
Kaufmann Kohler (1843-1926), The Jewish Encyclopedia, vol. 10, s.v. 'Purgatory' (New York: Funk & Wagnalls, 1901-1906) — section 'Rabbinic Views'
Patristic
Augustine says it is not impossible that something of the same kind may take place after this life. It may be inquired into, and either ascertained or left doubtful, whether some believers pass through a kind of purgatorial fire and are delivered from it less or more quickly as they loved goods that perish with more or less devotion.
Augustine of Hippo (354-430), On Faith, Hope, and Love (Enchiridion), in Nicene and Post-Nicene Fathers, ser. 1, vol. 3 (trans. J. F. Shaw; New York: Christian Literature Publishing Co., 1887) — ch. 69 (numbered 71 in the CCEL text), 'It is Not Impossible that Some Believers May Pass Through a Purgatorial Fire in the Future Life'
Catholic
The Council of Trent states that the Catholic Church, instructed by the Holy Ghost and drawing on the sacred writings and the ancient tradition of the Fathers, has taught in sacred councils and very recently in this oecumenical Synod that there is a Purgatory. The souls detained there are helped by the suffrages of the faithful.
The Council of Trent, Session XXV (1563), The Canons and Decrees of the Sacred and Oecumenical Council of Trent (trans. J. Waterworth; London: Dolman, 1848) — Session XXV, 'Decree concerning Purgatory'
Orthodox
The Synod of Jerusalem states that the souls of these and such like depart into Hades. There they endure the punishment due to the sins they have committed.
The Synod of Jerusalem (1672), under Patriarch Dositheus, The Acts and Decrees of the Synod of Jerusalem, sometimes called the Council of Bethlehem, holden under Dositheus, Patriarch of Jerusalem, in 1672 (trans. J. N. W. B. Robertson; London: Thomas Baker, 1899) — Confession of Dositheus, Decree XVIII
Reformed / Protestant
Calvin says that although God sometimes purges his people through afflictions, here he understands “fire” to mean the touchstone of the Spirit. By this, the Lord corrects and removes the ignorance of his people, which had held them captive for a time.
John Calvin (1509-1564), Commentary on the Epistles of Paul the Apostle to the Corinthians, vol. 1 (trans. John Pringle; Edinburgh: Calvin Translation Society, 1848) — Commentary on 1 Corinthians 3:10-15
Evangelical
Barnes says Paul does not say Christians will be doomed to the fires of purgatory, pass through fire, or be exposed to pains and punishment. He simply carries out the figure, saying they will be saved as if the action of fire had been felt on the edifice.
Albert Barnes (1798-1870), Notes on the New Testament, Explanatory and Practical (ed. Robert Frew; Grand Rapids: Baker Book House, 1949-50 reprint of the 19th-c. text, CCEL) — Note on 1 Corinthians 3:15