Matthew 5:28

but I say to you, that every one who looks upon a woman, to lust after her, already committed adultery with her in his heart.

Matthew 12:35

The good man, out of his good treasure, puts forth good things; and the evil man, out of his evil treasure, puts forth evil things.

Matthew 15:19

For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false-witnessings, blasphemies:

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 say to you, that every one who looks upon a woman, to lust after her, already committed adultery with her in his heart.
Matthew 12:35
The good man, out of his good treasure, puts forth good things; and the evil man, out of his evil treasure, puts forth evil things.
Matthew 15:19
For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false-witnessings, blasphemies: