Matthew 5:28

but I tell you, that whosoever looks on a woman with impure desires is already guilty of approving the fact.

Matthew 12:35

a good man out of the good treasure produces good things: and an evil man, out of the evil treasure, produces evil things.

Matthew 15:19

out of the heart proceed evil designs, murders, adulteries, fornications, thefts, false testimony, slanders.

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 whosoever looks on a woman with impure desires is already guilty of approving the fact.
Matthew 12:35
a good man out of the good treasure produces good things: and an evil man, out of the evil treasure, produces evil things.
Matthew 15:19
out of the heart proceed evil designs, murders, adulteries, fornications, thefts, false testimony, slanders.