Matthew 15:17 in the World English Bible
Don’t you understand that whatever goes into the mouth passes into the belly and then out of the body?
Context
16 And Jesus said, Are ye also yet without understanding?
17 Do not ye yet understand, that whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught?
18 But those things which proceed out of the mouth come forth from the heart; and they defile the man.