1 John 4:1

Beloved, believe not every spirit; but prove the spirits, whether they are from God: for many false prophets have gone out into the world.

2 Peter 2:1

But there were false prophets among the people, as there will be false teachers also among you; and these will stealthily introduce ruinous sects, and deny the Lord that bought them, bringing upon themselves swift destruction:

1 John 2:18

Little children, it is the last time; and, as you have heard that the antichrist is coming, even now there are many antichrists; by which we know that it is the last time.

1 Thessalonians 5:21

Prove all things; hold fast that which is good.

Luke 12:57

And why even of yourselves do you not judge what is right?

Acts 17:11

These were of a better disposition than those in Thessalonica, for they received the word with all readiness of mind, examining the Scriptures daily, whether these things were so.

1 Corinthians 12:10

to another, the working of mighty deeds; to another, prophecy; to another, the discerning of spirits; to another, different kinds of tongues; to another, the interpretation of tongues.

1 Corinthians 14:29

Let two or three prophets speak, and let the others judge:

1 Timothy 4:1

Now the Spirit says expressly, that, in the last times, some shall depart from the faith, giving heed to seducing spirits, and teachings suggested by demons,

2 John 1:7

For many deceivers have entered into the world, who con fess not that Jesus Christ came in the flesh: this is the deceiver and the antichrist.

Revelation 2:2

I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

Revelation 2:2-5

I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

Revelation 2:2

I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

Revelation 2:2

I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

Revelation 2:2-9

I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

Matthew 7:15-16

But beware of false prophets, who come to you in sheep's clothing, but within are ravenous wolves.

Matthew 24:4-5

And Jesus answered and said to them: Take heed that no one deceive you.

Matthew 24:23-26

Then if any one shall say to you: Lo! here is the Christ, or there; believe it not.

Mark 13:21

And then, if any one say to you: Lo! here is the Christ, or, Lo! there; believe him not.

Luke 21:8

He replied: Take heed that you be not deceived; for many will come in my name, saying: I am he; and, The time is near. Go not, therefore, after them.

Acts 20:29

For I know this, that, after my departure, rapacious wolves will enter in among you, who will not spare the flock;

Romans 16:18-19

For such serve not our Lord Christ, but their own appetites; and, by good words and fair speeches, they deceive the hearts of the simple.

2 Timothy 3:13

But evil men and impostors will become worse and worse, deceiving, and being deceived.

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
But beware of false prophets, who come to you in sheep's clothing, but within are ravenous wolves.
Matthew 24:4
And Jesus answered and said to them: Take heed that no one deceive you.
Romans 16:18
For such serve not our Lord Christ, but their own appetites; and, by good words and fair speeches, they deceive the hearts of the simple.
2 Peter 2:1
But there were false prophets among the people, as there will be false teachers also among you; and these will stealthily introduce ruinous sects, and deny the Lord that bought them, bringing upon themselves swift destruction:

Try

Luke 12:57
And why even of yourselves do you not judge what is right?
Acts 17:11
These were of a better disposition than those in Thessalonica, for they received the word with all readiness of mind, examining the Scriptures daily, whether these things were so.
Romans 16:19
For your obedience has gone abroad to all men: I rejoice, therefore, on your account. But I desire you to be wise in respect to that which is good, and guileless in respect to that which is evil.
1 Corinthians 14:29
Let two or three prophets speak, and let the others judge:
1 Thessalonians 5:21
Prove all things; hold fast that which is good.
Revelation 2:2
I know your works, and your labor, and your patience; and that you can not bear with those who are evil, and that you have tried those who say they are apostles, and are not, and have found them liars;

General references

Matthew 24:11
and many false prophets will arise, and deceive many;
John 8:47
He that is of God, hears God's words. For this reason you do not hear them, because you are not of God.
1 Corinthians 14:32
and the spirits of the prophets are subject to the prophets;