2 Thessalonians 2:9-12

The coming of the lawless one will be in accordance with the work of Satan displayed in all kinds of counterfeit miracles, signs and wonders, and in every sort of evil that deceives those who are perishing. They perish because they refused to love the truth and so be saved. For this reason God sends them a powerful delusion so that they will believe the lie and so that all will be condemned who have not believed the truth but have delighted in wickedness.

displayed in all kinds of counterfeit miracles, signs and wonders
Matthew 24:24 "For false Christs and false prophets will appear and perform great signs and miracles to deceive even the elect--if that were possible."
Revelation 13:13 And he performed great and miraculous signs, even causing fire to come down from heaven to earth in full view of men.

every sort of evil that deceives those who are perishing
1 Corinthians 1:18 For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God.

they refused to love the truth and so be saved
John 3:17-19 "For God did not send his Son into the world to condemn the world, but to save the world through him. Whoever believes in him is not condemned, but whoever does not believe stands condemned already because he has not believed in the name of God's one and only Son. This is the verdict: Light has come into the world, but men loved darkness instead of light because their deeds were evil."

For this reason God sends them
Romans 1:28 Furthermore, since they did not think it worthwhile to retain the knowledge of God, he gave them over to a depraved mind, to do what ought not to be done.

a powerful delusion
Matthew 24:5 "For many will come in my name, claiming, 'I am the Christ,' and will deceive many."
Mark 13:5 Jesus said to them: "Watch out that no one deceives you."

so that they will believe the lie
Romans 1:25 They exchanged the truth of God for a lie, and worshiped and served created things rather than the Creator--who is forever praised. Amen.

but have delighted in wickedness
Romans 1:32 Although they know God's righteous decree that those who do such things deserve death, they not only continue to do these very things but also approve of those who practice them.

NOTES:
Some additional verses:
2 Thessalonians 2:4, Matthew 4:10, John 4:48, Proverbs 4:6, John 14:6, Ephesians 4:21, Galatians 2:5, Ephesians 1:13, Romans 1:24-28, Romans 2:8

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.