Matthew 15:16

14Leave them alone. They are blind guides of the blind. If the blind guide the blind, both will fall into a pit.”

15Peter answered him, “Explain the parable to us.”

16So Jesus said, “Do you also still not understand?

17Don’t you understand that whatever goes into the mouth passes into the belly and then out of the body?

18But the things which proceed out of the mouth come out of the heart, and they defile the man.