It is in the Bible. You are just looking for the word “Purgatory.”
Here are the references:
Lk 12:58-59; 1 Cor 3:15; Mt 5:25-26 ... temporary agony.
Heb 12:6-11 ... God’s painful discipline.
Mt 12:32 ... no forgiveness ... nor in the age to come.
1 Pet 3:18-20 ... might be purgatory (limbo?).
1 Pet 4:6 ... preached to the dead.
Rev 21:27 ... nothing unclean shall enter heaven.
Heb 12:23 ... souls in heaven are perfect.
Col 1:24; 2 Sam 12:13-14 ... “extra” suffering.
2 Mac 12:43-46 ... sacrifice for the dead.
2 Tim 1:15-18 ... prayer for Onesiphorus for “that Day.”
1 Jn 5:14-17 ... mortal/venial sins
I thank you for the list of verses that supposedly support purgatory - I’ve wondered about it. Here’s how I see these verses in their Biblical context:
Luke 12:58-59 - is a hypothetical about earthly justice.
1 Cor 3:15 - this passage (from verse 10) talks about the rewards or lack thereof a saint has on judgment day. No post salvation good works, no reward - saved by grace but, as we might say to indicate a close shave, by the skin of this teeth.
Mt 5:25-26 - same account as Luke 12:58 - 59.
Heb 12:6 - 11 - talks about the discipline of God, compared to that of earthly fathers.
Mt 12:31 - 32 - a warning to Pharisees who credited miracles of Christ to the Devil.
1 Pet 3:18-20 - Limbo isn’t mentioned. Christ died once for the ungodly to redeem us and preached to “spirits in prison” - the meaning of which is not clear though men argue continually.
1 Pet 4:6 - All men are considered “dead in sins”, spiritually dead, unless redeemed by God (see Romans 7:1-6).
Rev 21:27 - all who are redeemed by and are in Christ are made clean by His blood, fit for heaven (Romans 3:21 - 26).
Heb 12:23 - The spirit of everyman justified by Christ is pure, complete, perfect; fit for heaven.
Col 1:24 - Paul speaks of his own suffering on behalf of Christ and the church.
2 Sam 12:13-14 - David is told how he will suffer during his earthly life for his sin of murder and adultery.
2 Mac 12:43-46 - not Scripture.
2 Tim 1:15 -18 - Paul praying for the family of a brother in Christ who is and has served with him.
1 Jn 5:14-17 - Nobody has a definite answer to what a “sin unto death” is. But John’s letter does make clear that “All unrighteousness is sin”.
In none of these verses does God reveal anything akin to purgatory. While a couple are unclear on meaning, purgatory needs a firm and clear foundation in Scripture in order to stand as a doctrine.
It’s a basic tenant of Biblical interpretation that doctrines are clearly stated - not based on a verse or two that are less than clear in their meaning.