Matthew 15:19
For out of the heart come evil thoughts, murder, adultery, immorality, stealing, false witnessing, irreverent speech.
Acts 8:22
So repent of this wickedness of yours, and pray to the Lord, to see if this thought of your heart may be forgiven you.
Matthew 5:28
But I tell you that anyone who looks at a woman so as to have an evil desire for her at once has already committed adultery with her in his heart,
Matthew 9:4
And Jesus knew their thoughts, and said, "Why do you have such wicked thoughts in your hearts?
2 Corinthians 10:5
For I am demolishing arguments and every barrier that is raised against the genuine knowledge of God, taking captive every thought to make it obedient to Christ,