2 Thessalonians 2:11

For this reason God sends them a strong delusion so that they will believe what is false,

Romans 1:28

And because they did not think it worthwhile to acknowledge God, God delivered them over to a worthless mind to do what is morally wrong.

Ezekiel 14:9

“But if the prophet is deceived and speaks a message, it was I, Yahweh, who deceived that prophet. I will stretch out My hand against him and destroy him from among My people Israel.

1 Kings 22:18-22

So the king of Israel said to Jehoshaphat, “Didn’t I tell you he never prophesies good about me, but only disaster?”

2 Chronicles 18:18-22

Then Micaiah said, “Therefore, hear the word of the Lord. I saw the Lord sitting on His throne, and the whole heavenly host was standing at His right hand and at His left hand.

Psalm 81:11-12

“But My people did not listen to Me;
Israel did not obey Me.

Psalm 109:17

He loved cursing—let it fall on him;
he took no delight in blessing—let it be far from him.

Isaiah 6:9-10

And He replied:

Go! Say to these people:
Keep listening, but do not understand;
keep looking, but do not perceive.

Isaiah 29:9-14

Stop and be astonished;
blind yourselves and be blind!
They are drunk, but not with wine;
they stagger, but not with beer.

Isaiah 44:20

He feeds on ashes.
His deceived mind has led him astray,
and he cannot deliver himself,
or say, “Isn’t there a lie in my right hand?”

Isaiah 66:4

So I will choose their punishment,
and I will bring on them what they dread
because I called and no one answered;
I spoke and they didn’t hear;
they did what was evil in My sight
and chose what I didn’t delight in.

Jeremiah 27:10

for they prophesy a lie to you so that you will be removed from your land. I will banish you, and you will perish.

Ezekiel 21:29

While they offer false visions
and lying divinations about you,
the time has come to put you
to the necks of the profane wicked ones;
the day has come
for your punishment.

Matthew 24:5

For many will come in My name, saying, ‘I am the Messiah,’ and they will deceive many.

Matthew 24:11

Many false prophets will rise up and deceive many.

John 12:39-43

This is why they were unable to believe, because Isaiah also said:

Romans 1:21-25

For though they knew God, they did not glorify Him as God or show gratitude. Instead, their thinking became nonsense, and their senseless minds were darkened.

1 Thessalonians 2:3

For our exhortation didn’t come from error or impurity or an intent to deceive.

1 Timothy 4:1

Now the Spirit explicitly says that in later times some will depart from the faith, paying attention to deceitful spirits and the teachings 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
But the magicians did the same thing by their occult practices and brought frogs up onto the land of Egypt.
Exodus 10:20
But the Lord hardened Pharaoh’s heart, and he did not let the Israelites go.
Leviticus 13:29
“When a man or woman has an infection on the head or chin,
Deuteronomy 13:2
and that sign or wonder he has promised you comes about, but he says, ‘Let us follow other gods,’ which you have not known, ‘and let us worship them,’
Deuteronomy 28:28
The Lord will afflict you with madness, blindness, and mental confusion,
Deuteronomy 29:4
Yet to this day the Lord has not given you a mind to understand, eyes to see, or ears to hear.
Psalm 109:17
He loved cursing—let it fall on him;
he took no delight in blessing—let it be far from him.
Isaiah 47:12
So take your stand with your spells
and your many sorceries,
which you have wearied yourself with from your youth.
Perhaps you will be able to succeed;
perhaps you will inspire terror!

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.