Gospel according to Mark 7,14-23
Jesus then called the people to him again and said to them, «Listen to me, all of you, and try to understand. Nothing that enters one from outside can make that person unclean. It is what comes out from within that makes unclean. Let everyone who has ears listen».
When Jesus got home and was away from the crowd, his disciples asked him about this saying and he replied, «So even you are dull? Do you not see that whatever comes from outside cannot make a person unclean? Since it enters, not the heart but the stomach and is finally passed out». Thus Jesus declared that all foods are clean. And he went on, «What comes out of a person is what defiles, for evil designs come out of the heart: theft, murder, adultery, jealousy, greed, maliciousness, deceit, indecency, slander, pride and folly. All these evil things come from within and make a person unclean».