2 Thessalonians 2:11

For this reason God will send upon them a deluding influence so that they will believe what is false,

Romans 1:28

And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper,

Ezekiel 14:9

“But if the prophet is prevailed upon to speak a word, it is I, the Lord, who have prevailed upon that prophet, and I will stretch out My hand against him and destroy him from among My people Israel.

1 Kings 22:18-22

Then the king of Israel said to Jehoshaphat, “Did I not tell you that he would not prophesy good concerning me, but evil?”

2 Chronicles 18:18-22

Micaiah said, “Therefore, hear the word of the Lord. I saw the Lord sitting on His throne, and all the host of heaven standing on His right and on His left.

Psalm 81:11-12

“But My people did not listen to My voice,
And Israel did not obey Me.

Psalm 109:17

He also loved cursing, so it came to him;
And he did not delight in blessing, so it was far from him.

Isaiah 6:9-10

He said, “Go, and tell this people:
‘Keep on listening, but do not perceive;
Keep on looking, but do not understand.’

Isaiah 29:9-14

Be delayed and wait,
Blind yourselves and be blind;
They become drunk, but not with wine,
They stagger, but not with strong drink.

Isaiah 44:20

He feeds on ashes; a deceived heart has turned him aside. And he cannot deliver himself, nor say, “Is there not a lie in my right hand?”

Isaiah 66:4

So I will choose their punishments
And will bring on them what they dread.
Because I called, but no one answered;
I spoke, but they did not listen.
And they did evil in My sight
And chose that in which I did not delight.”

Jeremiah 27:10

For they prophesy a lie to you in order to remove you far from your land; and I will drive you out and you will perish.

Ezekiel 21:29

while they see for you false visions, while they divine lies for you—to place you on the necks of the wicked who are slain, whose day has come, in the time of the punishment of the end.

Matthew 24:5

For many will come in My name, saying, ‘I am the Christ,’ and will mislead many.

Matthew 24:11

Many false prophets will arise and will mislead many.

John 12:39-43

For this reason they could not believe, for Isaiah said again,

Romans 1:21-25

For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their speculations, and their foolish heart was darkened.

1 Thessalonians 2:3

For our exhortation does not come from error or impurity or by way of deceit;

1 Timothy 4:1

But the Spirit explicitly says that in later times some will fall away from the faith, paying attention to deceitful spirits and doctrines of demons,

Treasury of Scripture Knowledge

Summary

And for this cause God shall send them strong delusion, that they should believe a lie:

Bible References

General references

Exodus 8:7
The magicians did the same with their secret arts, making frogs come up on the land of Egypt.
Exodus 10:20
But the Lord hardened Pharaoh’s heart, and he did not let the sons of Israel go.
Leviticus 13:29
“Now if a man or woman has an infection on the head or on the beard,
Deuteronomy 13:2
and the sign or the wonder comes true, concerning which he spoke to you, saying, ‘Let us go after other gods (whom you have not known) and let us serve them,’
Deuteronomy 28:28
The Lord will smite you with madness and with blindness and with bewilderment of heart;
Deuteronomy 29:4
Yet to this day the Lord has not given you a heart to know, nor eyes to see, nor ears to hear.
Psalm 109:17
He also loved cursing, so it came to him;
And he did not delight in blessing, so it was far from him.
Isaiah 47:12
“Stand fast now in your spells
And in your many sorceries
With which you have labored from your youth;
Perhaps you will be able to profit,
Perhaps you may cause trembling.