This is the first post I’ve seen where Elizabeth Prata has a voice over. You can hear her audio of the Post’s text. False teaching is an extensive Biblical doctrinally area. It’s rare that one can find such direct teaching about it today. I’ve downloaded the PDF she refers to and read the Conclusion and checklist at the end and plan to read the whole document.
I would encourage both men and women to read the post and PDF. I don’t think it mentions specific individuals, but one can fill in the gaps from their own experiences…some are more obvious than others.
But it’s not an area to be neglected just with the excuse of not wanting to be negative.
If you want the direct link to the PDF it’s here also:
You can find it linked below in a .pdf.
Identifying False Teachers: A Biblical Checklist for Identifying False Teachers in the Church
Source Copyright © Joel James, 2001. Used by permission. Joel James is a graduate of The Master’s Seminary in Los Angeles, California and serves as the Pastor-teacher of Grace Fellowship, Pretoria.
Rainbow Trout 
I had ChatGPT summarize Biblical Passages about false teachings. Note this was all at least 2,000 or mor years ago, way before the risk that AI itself would give you false statements….something to think about:
This is an excellent question, and the answer depends on what you mean by a “reference.”
If we include every passage that warns against false prophets, false teachers, false doctrine, lying prophets, deceivers, wolves, seducers, idol-priests, corrupt shepherds, and those who pervert God’s Word, the number is surprisingly high.
Here is a reasonable estimate based on the KJV.
Testament
Approximate references
Notes
Old Testament
160–200
Mostly warnings against false prophets, lying visions, idol priests, corrupt shepherds, and those leading Israel astray.
New Testament
110–140
Warnings about false teachers, false apostles, false prophets, antichrists, wolves, heresies, deceivers, and corrupt leaders.
So across the whole Bible there are approximately 270–340 separate passages dealing with false teaching in one form or another.
The Old Testament
The OT repeatedly warns Israel about people who speak for God but were never sent.
Major sections include:
Jeremiah alone contains over 30 passages condemning false prophets.
The New Testament
The NT intensifies the warnings because false teachers arise inside the church, not merely outside it.
Major passages include:
Jesus
Acts
The passage you quoted:
Acts 20:29–30
plus warnings in Acts 13 and Acts 15.
Paul’s letters
Paul constantly warns churches.
Examples:
Peter
Almost the entire book of 2 Peter 2 is devoted to false teachers.
John
John repeatedly warns about
especially:
Jude
Almost the whole epistle is a warning against false teachers.
Revelation
Warnings about:
One interesting observation
If you count chapters rather than verses, roughly one out of every twelve chapters of the New Testament contains a direct warning about false doctrine or false teachers.
Some scholars have noted that about one-quarter of the New Testament books have false teaching as one of their principal themes.
For example:
are either largely or almost entirely devoted to confronting doctrinal error.
From a Reformed perspective
Reformed theologians have often pointed out that Scripture places extraordinary emphasis on guarding sound doctrine. Institutes of the Christian Religion repeatedly stresses the church’s duty to preserve the pure preaching of God’s Word. Likewise, the Westminster Confession of Faith identifies “the pure preaching of the gospel” as one of the marks by which the true church is recognized.
The cumulative impression is striking: the Bible contains hundreds of warnings against religious deception. The Old Testament focuses primarily on false prophets who lead Israel into idolatry or falsely claim divine authority, while the New Testament repeatedly warns that false teachers will arise from within the visible church (Acts 20:29–30; 2 Peter 2; 1 John 4:1).
If you’re interested in a deeper study, I can also produce a comprehensive catalog of every passage in the KJV that warns about false teaching or false teachers—organized book by book, with every reference and a brief summary. That list would likely span 25–40 pages and serve as a thorough Bible study resource.
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