2 Thessalonians 2:11

And because of this, God sends them {a powerful delusion} so that they will believe the lie,

Romans 1:28

And just as they did not see fit {to recognize God}, God gave them over to a debased mind, to do the things [that are] not proper,

Ezekiel 14:9

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

1 Kings 22:18-22

Then the king of Israel said to Jehoshaphat, "Did I not say to you that he would not prophesy good concerning me, but disaster?"

2 Chronicles 18:18-22

Then Micaiah said, "Therefore hear the word of Yahweh: I saw Yahweh sitting upon his throne with 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 yield to me.

Psalm 109:17

Because he loved cursing, let it come [upon] him. Because he did not delight in blessing, let it be far from him.

Isaiah 6:9-10

And he said, "Go and say to this people, 'Keep on listening and do not comprehend! And keep on looking and do not understand!'

Isaiah 29:9-14

Be astonished and be amazed! Blind yourselves and be blinded! They are drunk but not [from] wine; they stagger but not [from] strong drink.

Isaiah 44:20

[He] feeds [on] ashes; a {deceived mind} misleads him. And he cannot save {himself}, and he cannot say, "Is [this] not an illusion in my right hand?"

Isaiah 66:4

Indeed, I myself I will choose their ill treatment, and I will bring them objects of their dread, because I called, and {no one answered}; I spoke and they did not listen, but they did the evil in my eyes, and they chose that in which I do not delight."

Jeremiah 27:10

For they [are] prophesying to you a lie, so that you [will be] removed from your land, and I will drive you away, and you will perish.

Ezekiel 21:29

when seeing a false vision for you in vain, when practicing divination for you falsely, to give you on [the] neck of [the] profane ones of [the] wicked, {whose day has come}, {the time of final punishment}.

Matthew 24:5

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

Matthew 24:11

and many false prophets will appear and will deceive many,

John 12:39-43

For this [reason] they were not able to believe, because again Isaiah said,

Romans 1:21-25

For [although they] knew God, they did not honor [him] as God or give thanks, but they became futile in their reasoning, and their senseless hearts were darkened.

1 Thessalonians 2:3

For our exhortation [is] not from error or from impurity or with deceit,

1 Timothy 4:1

Now the Spirit explicitly says that in the last times some will depart from the faith, paying attention 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
And the magicians did likewise with their secret arts, and they brought up frogs over the land of Egypt.
Exodus 10:20
And Yahweh hardened Pharaoh's heart, and he did not release the {Israelites}.
Leviticus 13:29
"And when a man or a woman {has} an infection on [the] head or in [the] beard,
Deuteronomy 13:2
and the sign or the wonder comes [about] that he spoke to you, {saying}, 'Let us go after other gods (those whom you have not known), and let us serve them,'
Deuteronomy 28:28
Yahweh shall afflict you with madness and with blindness and with confusion of heart.
Deuteronomy 29:4
But Yahweh has not given to you a heart to understand, or eyes to see, or ears to hear, [even] {to this day}.
Psalm 109:17
Because he loved cursing, let it come [upon] him. Because he did not delight in blessing, let it be far from him.
Isaiah 47:12
Stand, now, in your enchantments, and in your many sorceries with which you have labored from your youth. Perhaps you may be able to benefit; perhaps you may {scare away}.