It is not what enters one's mouth that defiles that person; but what comes out of the mouth is what defiles one. The things that come out of the mouth come from the heart, and they defile. For from the heart come evil thoughts, murder, adultery, unchastity, theft, false witness, blasphemy. These are what defile a person, but to eat with unwashed hands does not defile.
(Matthew 15:11,18-20, NAB)