2 Thessalonians 2:2

that ye not be easily shaken in understanding or be troubled neither by spirit nor by word nor by letter as from us, as if the day of Christ is at hand.

Mark 13:7

And when ye shall hear of wars and rumours of wars, be ye not troubled, for such things must needs be; but the end shall not be yet.

1 Corinthians 1:8

who shall also confirm that ye shall remain unimpeachable unto the end, in the day of our Lord Jesus Christ.

Deuteronomy 13:1-5

When there arises among you a prophet, or a dreamer of dreams, and gives thee a sign or a wonder,

Isaiah 7:2

And it was told the house of David, saying Syria is confederate with Ephraim. And his heart was moved and the heart of his people as the trees of the wood are moved with the wind.

Isaiah 8:12-13

Do not say, A confederacy, to all those to whom this people shall say, A confederacy; neither fear their fear, nor be afraid.

Isaiah 26:3

Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusts in thee.

Jeremiah 23:25-27

I have heard what those prophets said, that prophesy lies in my name, saying, I have dreamed, I have dreamed.

Micah 2:11

If there is one walking in the spirit of falsehood, he shall lie, saying, I will prophesy unto thee of wine and of strong drink; he shall even be the prophet of this people.

Matthew 24:4-6

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

Matthew 24:24

For there shall arise false Christs and false prophets and shall show great signs and wonders in such a manner that they shall deceive, if possible, the very elect.

Luke 21:9

But when ye shall hear of wars and seditions, be not terrified; for these things must first come to pass, but the end is not yet.

Luke 21:19

In your patience ye shall possess your souls.

John 14:1

Let not your heart be troubled; ye believe in God, believe also in me.

John 14:27

Peace I leave with you, my peace I give unto you; not as the world gives, give I unto you. Let not your heart be troubled, neither let it be afraid.

Acts 20:23-24

except that the Holy Spirit witnesses in every city, saying that prisons and tribulations await me.

Ephesians 5:6

Let no one deceive you with vain words, for because of these things the wrath of God comes upon the sons of disobedience.

1 Thessalonians 3:3

that no one should be moved in these tribulations, for you know that we are appointed for this.

1 Thessalonians 4:15

For this, we say unto you by the word of the Lord, that we who are alive and remain unto the coming of the Lord shall not precede those who are asleep.

1 Thessalonians 5:2

For ye know well that the day of the Lord shall come as a thief in the night.

2 Thessalonians 2:15

Therefore, brethren, stand fast and retain the doctrine which ye have been taught, whether by word or our epistle.

2 Thessalonians 3:17

Receive saving health from my hand, Paul, which is the sign in all my letters: so I write.

2 Peter 2:1-3

But there were also false prophets among the people, even as there shall be false teachers among you, who covertly shall bring in destructive sects and shall deny the Lord that bought them, bringing upon themselves swift destruction.

2 Peter 3:4-8

and saying, Where is the promise of his coming? For since the day in which the fathers fell asleep, all things continue as they were from the beginning of the creation.

1 John 4:1-2

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

Revelation 19:20

And the beast was taken and with it the false prophet that wrought miracles in its presence, with which he had deceived those that had taken the mark of the beast and had worshipped its image. These two were cast alive into the lake of fire burning with brimstone.

Treasury of Scripture Knowledge

Summary

That ye be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.

General references

Bible References

Shaken

Isaiah 7:2
And it was told the house of David, saying Syria is confederate with Ephraim. And his heart was moved and the heart of his people as the trees of the wood are moved with the wind.
Isaiah 8:12
Do not say, A confederacy, to all those to whom this people shall say, A confederacy; neither fear their fear, nor be afraid.
Isaiah 26:3
Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusts in thee.
Matthew 24:6
And ye shall hear of wars and rumours of wars; see that ye be not troubled, for it is necessary that all these things must take place; but the end is not yet.
Mark 13:7
And when ye shall hear of wars and rumours of wars, be ye not troubled, for such things must needs be; but the end shall not be yet.
Luke 21:9
But when ye shall hear of wars and seditions, be not terrified; for these things must first come to pass, but the end is not yet.
John 14:1
Let not your heart be troubled; ye believe in God, believe also in me.
Acts 20:23
except that the Holy Spirit witnesses in every city, saying that prisons and tribulations await me.
Ephesians 5:6
Let no one deceive you with vain words, for because of these things the wrath of God comes upon the sons of disobedience.
1 Thessalonians 3:3
that no one should be moved in these tribulations, for you know that we are appointed for this.

By spirit

Deuteronomy 13:1
When there arises among you a prophet, or a dreamer of dreams, and gives thee a sign or a wonder,
Jeremiah 23:25
I have heard what those prophets said, that prophesy lies in my name, saying, I have dreamed, I have dreamed.
Micah 2:11
If there is one walking in the spirit of falsehood, he shall lie, saying, I will prophesy unto thee of wine and of strong drink; he shall even be the prophet of this people.
Matthew 24:4
And Jesus answered and said unto them, Take heed that no one deceive you.
2 Peter 2:1
But there were also false prophets among the people, even as there shall be false teachers among you, who covertly shall bring in destructive sects and shall deny the Lord that bought them, bringing upon themselves swift destruction.
1 John 4:1
Beloved, do not believe every spirit, but try the spirits whether they are of God because many false prophets are gone out into the world.
Revelation 19:20
And the beast was taken and with it the false prophet that wrought miracles in its presence, with which he had deceived those that had taken the mark of the beast and had worshipped its image. These two were cast alive into the lake of fire burning with brimstone.

Nor by letter

1 Thessalonians 4:15
For this, we say unto you by the word of the Lord, that we who are alive and remain unto the coming of the Lord shall not precede those who are asleep.
2 Peter 3:4
and saying, Where is the promise of his coming? For since the day in which the fathers fell asleep, all things continue as they were from the beginning of the creation.

General references

Acts 3:20
who has sent Jesus Christ, who before was preached unto you,