Mark 7:15-19

there is nothing from without the man, that going into him can defile him; but the things which proceed out of the man are those that defile the man. And when he was entered into the house from the multitude, his disciples asked of him the parable. And he saith unto them, Are ye so without understanding also? Perceive ye not, that whatsoever from without goeth into the man, it cannot defile him; because it goeth not into his heart, but into his belly, and goeth out into the draught? This he said, making all meats clean.