2 Thessalonians 2:11

Therefore God sends them a strong delusion, so that they may believe what is false,

Romans 1:28

And since they did not see fit to acknowledge God, God gave them up to a debased mind to do what ought not to be done.

Ezekiel 14:9

And if the prophet is deceived and speaks a word, I, the LORD, have deceived that prophet, and I will stretch out my hand against him and will destroy him from the midst of my people Israel.

1 Kings 22:18-22

And 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

And 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 hand and on his left.

Psalm 81:11-12

"But my people did not listen to my voice; Israel would not submit to me.

Psalm 109:17

He loved to curse; let curses come upon him! He did not delight in blessing; may it be far from him!

Isaiah 6:9-10

And he said, "Go, and say to this people: "'Keep on hearing, but do not understand; keep on seeing, but do not perceive.'

Isaiah 29:9-14

Astonish yourselves and be astonished; blind yourselves and be blind! Be drunk, but not with wine; stagger, but not with strong drink!

Isaiah 44:20

He feeds on ashes; a deluded heart has led him astray, and he cannot deliver himself or say, "Is there not a lie in my right hand?"

Isaiah 66:4

I also will choose harsh treatment for them and bring their fears upon them, because when I called, no one answered, when I spoke, they did not listen; but they did what was evil in my eyes and chose that in which I did not delight."

Jeremiah 27:10

For it is a lie that they are prophesying to you, with the result that you will be removed 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 profane wicked, whose day has come, the time of their final punishment.

Matthew 24:5

For many will come in my name, saying, 'I am the Christ,' and they will lead many astray.

Matthew 24:11

And many false prophets will arise and lead many astray.

John 12:39-43

Therefore they could not believe. For again Isaiah said,

Romans 1:21-25

For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.

1 Thessalonians 2:3

For our appeal does not spring from error or impurity or any attempt to deceive,

1 Timothy 4:1

Now the Spirit expressly says that in later times some will depart from the faith by devoting themselves to deceitful spirits and 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 by their secret arts and made frogs come up on the land of Egypt.
Exodus 10:20
But the LORDhardened Pharaoh's heart, and he did not let the people of Israel go.
Leviticus 13:29
"When a man or woman has a disease on the head or the beard,
Deuteronomy 13:2
and the sign or wonder that he tells you comes to pass, and if he says, 'Let us go after other gods,' which you have not known, 'and let us serve them,'
Deuteronomy 28:28
The LORD will strike you with madness and blindness and confusion of mind,
Deuteronomy 29:4
But to this day the LORD has not given you a heart to understand or eyes to see or ears to hear.
Psalm 109:17
He loved to curse; let curses come upon him! He did not delight in blessing; may it be far from him!
Isaiah 47:12
Stand fast in your enchantments and your many sorceries, with which you have labored from your youth; perhaps you may be able to succeed; perhaps you may inspire terror.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.