Don’t you know that the food you put into your mouth goes into your stomach and then out of your body? But the words that come out of your mouth come from your heart. And they are what make you unfit to worship God. Out of your heart come evil thoughts, murder, unfaithfulness in marriage, vulgar deeds, stealing, telling lies, and insulting others. These are what make you unclean. Eating without washing your hands will not make you unfit to worship God.
Matthew 15:17–20