Matthew 15:18-20

18But whatever [word] comes out of the mouth comes from the heart, and this is what defiles and dishonors the man.

19For out of the heart come evil thoughts and plans, murders, adulteries, sexual immoralities, thefts, false testimonies, slanders (verbal abuse, irreverent speech, blaspheming).

20These are the things which defile and dishonor the man; but eating with [ceremonially] unwashed hands does not defile the man.”