Matthew 5:28

But I tell you, any one who even looks with lust at a woman has committed adultery with her already in his heart.

Matthew 12:35

The good man brings good out of his good store, and the evil man brings evil out of his store of evil.

Matthew 15:19

For out of the heart come evil designs, murder, adultery, sexual vice, stealing, false witness, and slander.

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, any one who even looks with lust at a woman has committed adultery with her already in his heart.
Matthew 12:35
The good man brings good out of his good store, and the evil man brings evil out of his store of evil.
Matthew 15:19
For out of the heart come evil designs, murder, adultery, sexual vice, stealing, false witness, and slander.