Matthew 15:19
For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, railings.
Acts 8:22
Repent therefore of this thy wickedness, and pray God, if perhaps the thought of thy heart may be forgiven thee.
Matthew 5:28
But I say unto you, That whosoever looketh upon a woman to lust after her, hath already committed adultery with her in his heart.
Matthew 9:4
And Jesus seeing their thoughts said, Why think ye evil in your hearts?
2 Corinthians 10:5
Destroying reasonings, and every high thing which exalteth itself against the knowledge of God, and bringing every thought into captivity to the obedience of Christ,