Matthew 5:28

But I tell you that anyone who looks at a woman with desire has already committed adultery with her in his heart.

Matthew 12:35

A good man, out of the good he has accumulated, brings out things that are good, and a bad man, out of what he has accumulated that is bad, brings out things that are bad.

Matthew 15:19

For out of the heart come wicked designs, murder, adultery, immorality, stealing, false witness, impious speech.

Treasury of Scripture Knowledge

Summary

And let none of you imagine evil in your hearts against his neighbour; and love no false oath: for all these are things that I hate, saith the LORD.

Bible References

Let

Matthew 5:28
But I tell you that anyone who looks at a woman with desire has already committed adultery with her in his heart.
Matthew 12:35
A good man, out of the good he has accumulated, brings out things that are good, and a bad man, out of what he has accumulated that is bad, brings out things that are bad.
Matthew 15:19
For out of the heart come wicked designs, murder, adultery, immorality, stealing, false witness, impious speech.