1 John 4:1

Beloved, do not believe every spirit. Test the spirits to see whether they are from God. This is because many false prophets have gone out into the world.

2 Peter 2:1

There arose false prophets among the people. There will be false teachers among you! They will privately bring in destructive heresies (contrary doctrines), denying even the Master who bought them. They bring swift destruction on themselves.

1 John 2:18

Little children, it is the last hour! You heard that the antichrist is coming. Even now many antichrists have come. That is how we know that it is the last hour.

1 Thessalonians 5:21

Prove all things; hold fast to what is good.

Luke 12:57

Why do you not judge what is right?

Acts 17:11

The Bereans were nobler than those in Thessalonica because they received the word with all readiness of mind and examined the Scriptures daily to see if what Paul told them was true.

1 Corinthians 12:10

To another the workings of miracles and to another prophesy. To another 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 listen.

1 Timothy 4:1

The Spirit explicitly says that some will fall away from the faith (truth) in later times. Spirits and doctrines of demons will seduce them,

2 John 1:7

For many deceivers have gone into the world. They do not confess 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. I also know how you cannot tolerate those who are evil. You tested those who say they are apostles. They are not apostles. You found them to be liars.

Deuteronomy 13:1-5

If a prophet or an interpreter of dreams appears among you and gives you a sign or a wonder (portent) (omen) (forecast of the future),

Proverbs 14:15

The simple believes every word, but the prudent man gives thought to his steps.

Jeremiah 5:31

Prophets prophesy falsehoods. Priests rule under the prophets' directions, and my people love this. But what will you do when the end comes?'

Jeremiah 29:8-9

This is what Jehovah of Hosts, the God of Israel, says: 'Do not let the prophets or the mediums among you trick you. Do not even listen to your own dreams.

Matthew 7:15-16

Watch out for the false prophets. They are disguised as sheep. But in their hearts they are vicious wolves.

Matthew 24:4-5

Jesus answered: Be careful that no man misleads you.

Matthew 24:23-26

If someone says, 'Here is the Christ,' or, 'Over there is the Christ,' do not believe it.

Mark 13:21

If any man will say to you here is the Christ or there is the Christ do not believe it.

Luke 21:8

He said: Take heed that you are not led astray. Many will come in my name, saying, I am he but the time is not at hand. Do not follow them.

Acts 20:29

I know that after my departing grievous wolves will enter in among you, not sparing the flock.

Romans 16:18-19

They do not serve our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the unaware.

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

Deuteronomy 13:1
If a prophet or an interpreter of dreams appears among you and gives you a sign or a wonder (portent) (omen) (forecast of the future),
Proverbs 14:15
The simple believes every word, but the prudent man gives thought to his steps.
Jeremiah 5:31
Prophets prophesy falsehoods. Priests rule under the prophets' directions, and my people love this. But what will you do when the end comes?'
Jeremiah 29:8
This is what Jehovah of Hosts, the God of Israel, says: 'Do not let the prophets or the mediums among you trick you. Do not even listen to your own dreams.
Matthew 7:15
Watch out for the false prophets. They are disguised as sheep. But in their hearts they are vicious wolves.
Matthew 24:4
Jesus answered: Be careful that no man misleads you.
Romans 16:18
They do not serve our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the unaware.
2 Peter 2:1
There arose false prophets among the people. There will be false teachers among you! They will privately bring in destructive heresies (contrary doctrines), denying even the Master who bought them. They bring swift destruction on themselves.

Try

Luke 12:57
Why do you not judge what is right?
Acts 17:11
The Bereans were nobler than those in Thessalonica because they received the word with all readiness of mind and examined the Scriptures daily to see if what Paul told them was true.
Romans 16:19
Your obedience has come to our attention abroad. I am glad therefore on your behalf. Yet I would have you wise to that which is good and simple concerning evil.
1 Corinthians 14:29
Let two or three prophets speak and let the others listen.
1 Thessalonians 5:21
Prove all things; hold fast to what is good.
Revelation 2:2
I know your works, and your labor, and your patience. I also know how you cannot tolerate those who are evil. You tested those who say they are apostles. They are not apostles. You found them to be liars.

General references

Deuteronomy 18:21
You may wonder: How shall we recognize that Jehovah did not speak this message?
Proverbs 19:27
Stop listening to instruction (discipline) (correction), my son, and you will stray from the words of knowledge.
Matthew 24:11
Many false prophets will arise and lead many astray.
John 8:47
He that is of God hears the words of God. That is why you do not listen. You are not from God!
1 Corinthians 14:32
Let the prophets control the spirits (minds) (mental disposition) of the prophets.