Matthew 15:19
For out of the heart come forth evil thoughts, murder, adultery, unchastity, theft, perjury, slander.
Acts 8:22
Repent then of this your wickedness, and beseech the Lord to forgive you this purpose of your heart.
Matthew 5:28
But I say to you that whoever looks with lust at a woman has already committed adultery with her in his heart.
Matthew 9:4
And because Jesus knew well their thought, he said:
2 Corinthians 10:5
For I pull down imaginations and every crag that lifts itself against the knowledge of God. And I carry every thought away into captivity and subjection to Christ;