Matthew 15:16-19

And He said, “Are you still so dull [and unable to put things together]? Do you not understand that whatever goes into the mouth passes into the stomach, and is eliminated? But whatever [word]comes out of the mouth comes from the heart, and this is what defiles and dishonors the man. For out of the heart come evil thoughts and plans, murders, adulteries, sexual immoralities, thefts, false testimonies, slanders (verbal abuse, irreverent speech, blaspheming).