Bible Verses About Slander: Comes from the evil heart

For from the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false testimonies, blasphemies.

A good man out of the good treasure of his heart bringeth forth that which is good: and an evil man out of the evil treasure bringeth forth that which is evil. For out of the abundance of the heart the mouth speaketh.