1 John 4:1

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

2 Peter 2:1

But there were also false prophets among the people, as there shall also be false teachers among you, who shall bring in by stealth destructive heresies, even denying the master that bought them, bringing on themselves swift destruction;

1 John 2:18

Little children, it is the last time; and as you heard that antichrist is coming, even now many have become anti-christs; whence we know that it is the last time.

1 Thessalonians 5:21

Prove all things, hold fast the good;

Luke 12:57

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

Acts 17:11

but these were more noble than those in Thessalonica, for they received the word with all readiness, examining the Scriptures daily [to see] if these things were so.

1 Corinthians 12:10

and to another the performance of mighty works, and to another prophecy, and to another discrimination of spirits, and to another different tongues, and to another an interpretation of tongues;

1 Corinthians 14:29

Let two or three prophets speak, and let the rest judge;

1 Timothy 4:1

But the Spirit says expressly, that in the last times some shall apostatize from the faith, attending to lying spirits and doctrines of demons,

2 John 1:7

For many deceivers have gone out into the world, who do not confess Jesus Christ coming 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 cannot bear the wicked, and you tried those who say they are apostles and are not, and found them false;

Revelation 2:2-5

I know your works and your labor and your patience, and that you cannot bear the wicked, and you tried those who say they are apostles and are not, and found them false;

Revelation 2:2

I know your works and your labor and your patience, and that you cannot bear the wicked, and you tried those who say they are apostles and are not, and found them false;

Revelation 2:2

I know your works and your labor and your patience, and that you cannot bear the wicked, and you tried those who say they are apostles and are not, and found them false;

Revelation 2:2-9

I know your works and your labor and your patience, and that you cannot bear the wicked, and you tried those who say they are apostles and are not, and found them false;

Matthew 7:15-16

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

Matthew 24:4-5

And Jesus answered and said to them, See that no man deceives you;

Matthew 24:23-26

Then if one says to you, Behold, here is the Christ, or there! believe it not.

Mark 13:21

And then if any one says to you, Behold the Christ is here! Behold there! believe it not.

Luke 21:8

And he said, See that you be not deceived; for many shall come in my name, saying, I am [Christ], and the time is at hand; go not after them.

Acts 20:29

For I know that after my departure grievous wolves will come among you, not sparing the flock,

Romans 16:18-19

for such serve not our anointed Lord, but themselves, And by kind and complimentary words deceive the minds of the simple.

2 Timothy 3:13

But evil men and impostors will grow 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 they are rapacious wolves.
Matthew 24:4
And Jesus answered and said to them, See that no man deceives you;
Romans 16:18
for such serve not our anointed Lord, but themselves, And by kind and complimentary words deceive the minds of the simple.
2 Peter 2:1
But there were also false prophets among the people, as there shall also be false teachers among you, who shall bring in by stealth destructive heresies, even denying the master that bought them, bringing on themselves swift destruction;

Try

Luke 12:57
And why even of yourselves do you not judge what is right?
Acts 17:11
but these were more noble than those in Thessalonica, for they received the word with all readiness, examining the Scriptures daily [to see] if these things were so.
Romans 16:19
For your obedience has come to all; I rejoice in you therefore, but I wish you to be wise for that which is good, and simple for evil.
1 Corinthians 14:29
Let two or three prophets speak, and let the rest judge;
1 Thessalonians 5:21
Prove all things, hold fast the good;
Revelation 2:2
I know your works and your labor and your patience, and that you cannot bear the wicked, and you tried those who say they are apostles and are not, and found them false;

General references

Matthew 24:11
and many false prophets shall be raised up and deceive many,
John 8:47
He that is of God hears the words of God; you, therefore, hear not, because you are not of God.
1 Corinthians 14:32
And the spirits of prophets are subject to the prophets;