2 Thessalonians 2:2

that you not be easily shaken from your composure, nor be troubled either by a spirit or by a message or by a letter {alleged to be from us}, to the effect that the day of the Lord has arrived.

Mark 13:7

And when you hear about wars and rumors of wars, do not be alarmed. This must happen, but the end [is] not yet.

1 Corinthians 1:8

who will also confirm you until the end, blameless in the day of our Lord Jesus Christ.

Deuteronomy 13:1-5

"If a prophet stands up in your midst or a dreamer of dreams and he gives to you a sign or wonder,

Isaiah 7:2

When it was reported to the house of David, saying "Aram stands by Ephraim," his heart and the heart of his people shook like the shaking of the trees of [the] forest because of [the] wind.

Isaiah 8:12-13

"You must not call conspiracy everything that this people calls conspiracy, and you must not {share its fear}, and you must not be in dread.

Isaiah 26:3

You will protect a firm inclination [in] peace, [in] peace because he trusts in you.

Jeremiah 23:25-27

"I have heard what the prophets who prophesy lies have said in my name, {saying}, 'I have dreamed! I have dreamed!'

Micah 2:11

If a man walks about in a spirit of deception and lies, [saying] "I will preach to you of wine and strong drink," then he would be a preacher [for] this people!

Matthew 24:4-6

And Jesus answered [and] said to them, "Watch out that no one deceives you!

Matthew 24:24

For false messiahs and false prophets will appear, and will produce great signs and wonders in order to deceive, if possible, even the elect.

Luke 21:9

And when you hear about wars and insurrections, do not be terrified, for these [things] must happen first, but the end [will] not [be] at once."

Luke 21:19

By your patient endurance you will gain your lives.

John 14:1

"Do not let your hearts be troubled. You believe in God; believe also in me.

John 14:27

"Peace I leave with you; my peace I give to you--not as the world gives, I give to you. Do not let your hearts be troubled, and do not let [them] be afraid.

Acts 20:23-24

except that the Holy Spirit testifies to me in town [after town], saying that bonds and persecutions await me.

Ephesians 5:6

Let no one deceive you with empty words, for because of these [things] the wrath of God is coming on the sons of disobedience.

1 Thessalonians 3:3

[so that] no one would be shaken by these afflictions. For [you] yourselves know that we are appointed for this,

1 Thessalonians 4:15

For this we say to you by the word of the Lord, that we who are alive, who remain until the Lord's coming, will not possibly precede those who have fallen asleep.

1 Thessalonians 5:2

for [you] yourselves well know that the day of the Lord is coming in the [same] way as a thief in the night.

2 Thessalonians 2:15

So then, brothers, stand firm and hold fast to the traditions which you were taught, whether by [spoken] word or by letter from us.

2 Thessalonians 3:17

The greeting [is] by my hand, Paul's, which is {a sign of genuineness} in every letter: {this is how I write}.

2 Peter 2:1-3

But there were also false prophets among the people, as there will be false teachers among you also, who will bring in {destructive heresies}, even denying the Master who bought them, [thus] bringing on themselves swift destruction.

2 Peter 3:4-8

and saying, "Where is the promise of his coming? For {ever since} the fathers fell asleep, all [things] have continued just as they have been from the beginning of creation."

1 John 4:1-2

Dear friends, do not believe every spirit, but test the spirits [to determine] if they are from God, because many false prophets have gone out into the world.

Revelation 19:20

And the beast was seized, and with him the false prophet who performed the signs before him, by which he deceived those who received the mark of the beast and those who had worshiped his image. The two were thrown alive into the lake of fire that burns with sulphur.

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
When it was reported to the house of David, saying "Aram stands by Ephraim," his heart and the heart of his people shook like the shaking of the trees of [the] forest because of [the] wind.
Isaiah 8:12
"You must not call conspiracy everything that this people calls conspiracy, and you must not {share its fear}, and you must not be in dread.
Isaiah 26:3
You will protect a firm inclination [in] peace, [in] peace because he trusts in you.
Matthew 24:6
And you are going to hear about wars and rumors of wars. See to it that you are not alarmed, for this must happen, but the end is not yet.
Mark 13:7
And when you hear about wars and rumors of wars, do not be alarmed. This must happen, but the end [is] not yet.
Luke 21:9
And when you hear about wars and insurrections, do not be terrified, for these [things] must happen first, but the end [will] not [be] at once."
John 14:1
"Do not let your hearts be troubled. You believe in God; believe also in me.
Acts 20:23
except that the Holy Spirit testifies to me in town [after town], saying that bonds and persecutions await me.
Ephesians 5:6
Let no one deceive you with empty words, for because of these [things] the wrath of God is coming on the sons of disobedience.
1 Thessalonians 3:3
[so that] no one would be shaken by these afflictions. For [you] yourselves know that we are appointed for this,

By spirit

Deuteronomy 13:1
"If a prophet stands up in your midst or a dreamer of dreams and he gives to you a sign or wonder,
Jeremiah 23:25
"I have heard what the prophets who prophesy lies have said in my name, {saying}, 'I have dreamed! I have dreamed!'
Micah 2:11
If a man walks about in a spirit of deception and lies, [saying] "I will preach to you of wine and strong drink," then he would be a preacher [for] this people!
Matthew 24:4
And Jesus answered [and] said to them, "Watch out that no one deceives you!
2 Peter 2:1
But there were also false prophets among the people, as there will be false teachers among you also, who will bring in {destructive heresies}, even denying the Master who bought them, [thus] bringing on themselves swift destruction.
1 John 4:1
Dear friends, do not believe every spirit, but test the spirits [to determine] if they are from God, because many false prophets have gone out into the world.
Revelation 19:20
And the beast was seized, and with him the false prophet who performed the signs before him, by which he deceived those who received the mark of the beast and those who had worshiped his image. The two were thrown alive into the lake of fire that burns with sulphur.

Nor by letter

1 Thessalonians 4:15
For this we say to you by the word of the Lord, that we who are alive, who remain until the Lord's coming, will not possibly precede those who have fallen asleep.
2 Peter 3:4
and saying, "Where is the promise of his coming? For {ever since} the fathers fell asleep, all [things] have continued just as they have been from the beginning of creation."

General references

Acts 3:20
so that times of refreshing may come from the presence of the Lord, and he may send the Christ appointed for you--Jesus,