1 John 4:1

Dear friends, do not trust every inspiration, but test each inspiration, to see whether it proceeds from God; because many false Prophets have gone out into the world.

2 Peter 2:1

But there were false prophets also in the nation, just as there will be false teachers among you, men who will secretly introduce ruinous divisions, disowning even the Lord who bought them, and bringing speedy Ruin upon themselves.

1 John 2:18

My Children, these are the last days. You were told that an Anti-Christ was coming; and many Anti-Christ's have already arisen. By that we know that these are the last days.

1 Thessalonians 5:21

Bring everything to the test; cling to what is good;

Luke 12:57

Why do not you yourselves decide what is right?

Acts 17:11

These Jews of Beroea were better disposed than those in Thessalonica, for they welcomed the Message with great readiness, and daily examined the Scriptures to see if what was said was true.

1 Corinthians 12:10

To another the gift of preaching; to another the gift of distinguishing between true and false inspiration; to another varieties of the gift of 'tongues'; to another the power to interpret 'tongues.'

1 Corinthians 14:29

Of preachers two or three should speak, and the rest should weigh well what is said.

1 Timothy 4:1

But the Spirit distinctly says that in later times there will be some who will fall away from the Faith, and devote their attention to misleading spirits, and to the teaching of demons,

2 John 1:7

I say this because many impostors have left us to go into the world--men who do not acknowledge Jesus as Christ come in our human nature. It is that which marks a man as an impostor and an anti-Christ.

Revelation 2:2

I know your life, your toil and endurance, and I know that you cannot tolerate evil-doers. I know, too, how you tested those who declare that they are Apostles, though they are not, and how you proved them false.

Matthew 7:15-16

Beware of false Teachers--men who come to you in the guise of sheep, but at heart they are ravenous wolves.

Matthew 24:4-5

Jesus replied to them as follows: "See that no one leads you astray;

Matthew 24:23-26

And, at that time, if any one should say to you 'Look! here is the Christ!' or 'Here he is!', do not believe it;

Mark 13:21

And at that time if any one should say to you 'Look, here is the Christ!' 'Look, there he is!', do not believe it;

Luke 21:8

And Jesus said: "See that you are not led astray; for many will take my name, and come saying 'I am He,' and 'The time is close at hand.' Do not follow them.

Acts 20:29

I know that, after my departure, merciless wolves will get in among you, who will not spare the flock;

Romans 16:18-19

For such persons are not serving Christ, our Master, but are slaves to their own appetites; and, by their smooth words and flattery, they deceive simple-minded people.

2 Timothy 3:13

but wicked people and impostors will go from bad to worse, deceiving others and deceived themselves.

Treasury of Scripture Knowledge

Summary

Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.

Bible References

Believe not

Matthew 7:15
Beware of false Teachers--men who come to you in the guise of sheep, but at heart they are ravenous wolves.
Matthew 24:4
Jesus replied to them as follows: "See that no one leads you astray;
Romans 16:18
For such persons are not serving Christ, our Master, but are slaves to their own appetites; and, by their smooth words and flattery, they deceive simple-minded people.
2 Peter 2:1
But there were false prophets also in the nation, just as there will be false teachers among you, men who will secretly introduce ruinous divisions, disowning even the Lord who bought them, and bringing speedy Ruin upon themselves.

Try

Luke 12:57
Why do not you yourselves decide what is right?
Acts 17:11
These Jews of Beroea were better disposed than those in Thessalonica, for they welcomed the Message with great readiness, and daily examined the Scriptures to see if what was said was true.
Romans 16:19
Every one has heard of your ready obedience. It is true that I am very happy about you, but I want you to be well versed in all that is good, and innocent of all that is bad.
1 Corinthians 14:29
Of preachers two or three should speak, and the rest should weigh well what is said.
1 Thessalonians 5:21
Bring everything to the test; cling to what is good;
Revelation 2:2
I know your life, your toil and endurance, and I know that you cannot tolerate evil-doers. I know, too, how you tested those who declare that they are Apostles, though they are not, and how you proved them false.

General references

Matthew 24:11
Many false Prophets, also, will appear and lead many astray;
John 8:47
He who comes from God listens to God's teaching; the reason why you do not listen is because you do not come from God."
1 Corinthians 14:32
(The spirit that moves the preachers is within the preachers' control;