1 John 4:1

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

2 Peter 2:1

But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.

1 John 2:18

Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time.

1 Thessalonians 5:21

Prove all things; hold fast that which is good.

Luke 12:57

Yea, and why even of yourselves judge ye not what is right?

Acts 17:11

These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so.

1 Corinthians 12:10

To another the working of miracles; to another prophecy; to another discerning of spirits; to another divers kinds of tongues; to another the interpretation of tongues:

1 Corinthians 14:29

Let the prophets speak two or three, and let the other judge.

1 Timothy 4:1

Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;

2 John 1:7

For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.

Revelation 2:2

I know thy works, and thy labour, and thy patience, and how thou canst not bear them which are evil: and thou hast tried them which say they are apostles, and are not, and hast found them liars:

Deuteronomy 13:1-5

If there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder,

Proverbs 14:15

The simple believeth every word: but the prudent man looketh well to his going.

Jeremiah 5:31

The prophets prophesy falsely, and the priests bear rule by their means; and my people love to have it so: and what will ye do in the end thereof?

Jeremiah 29:8-9

For thus saith the LORD of hosts, the God of Israel; Let not your prophets and your diviners, that be in the midst of you, deceive you, neither hearken to your dreams which ye cause to be dreamed.

Matthew 7:15-16

Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.

Matthew 24:4-5

And Jesus answered and said unto them, Take heed that no man deceive you.

Matthew 24:23-26

Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.

Mark 13:21

And then if any man shall say to you, Lo, here is Christ; or, lo, he is there; believe him not:

Luke 21:8

And he said, Take heed that ye be not deceived: for many shall come in my name, saying, I am Christ; and the time draweth near: go ye not therefore after them.

Acts 20:29

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

Romans 16:18-19

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

2 Timothy 3:13

But evil men and seducers shall wax 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 there arise among you a prophet, or a dreamer of dreams, and giveth thee a sign or a wonder,
Proverbs 14:15
The simple believeth every word: but the prudent man looketh well to his going.
Jeremiah 5:31
The prophets prophesy falsely, and the priests bear rule by their means; and my people love to have it so: and what will ye do in the end thereof?
Jeremiah 29:8
For thus saith the LORD of hosts, the God of Israel; Let not your prophets and your diviners, that be in the midst of you, deceive you, neither hearken to your dreams which ye cause to be dreamed.
Matthew 7:15
Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.
Matthew 24:4
And Jesus answered and said unto them, Take heed that no man deceive you.
Romans 16:18
For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.
2 Peter 2:1
But there were false prophets also among the people, even as there shall be false teachers among you, who privily shall bring in damnable heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.

Try

Luke 12:57
Yea, and why even of yourselves judge ye not what is right?
Acts 17:11
These were more noble than those in Thessalonica, in that they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so.
Romans 16:19
For your obedience is come abroad unto all men. I am glad therefore on your behalf: but yet I would have you wise unto that which is good, and simple concerning evil.
1 Corinthians 14:29
Let the prophets speak two or three, and let the other judge.
1 Thessalonians 5:21
Prove all things; hold fast that which is good.
Revelation 2:2
I know thy works, and thy labour, and thy patience, and how thou canst not bear them which are evil: and thou hast tried them which say they are apostles, and are not, and hast found them liars:

General references

Deuteronomy 18:21
And if thou say in thine heart, How shall we know the word which the LORD hath not spoken?
Proverbs 19:27
Cease, my son, to hear the instruction that causeth to err from the words of knowledge.
Matthew 24:11
And many false prophets shall rise, and shall deceive many.
John 8:47
He that is of God heareth God's words: ye therefore hear them not, because ye are not of God.
1 Corinthians 14:32
And the spirits of the prophets are subject to the prophets.