Matthew 15:11
It is not what goes into the mouth that defiles a person, but what comes out of the mouth; this defiles a person. The principle that overturns the ritual purity framework: what enters the mouth (food) does not defile; what exits the mouth (speech from the heart) does defile. The principle is not the abolition of the dietary laws in their immediate application but the identification of moral impurity (from the heart) as more fundamentally defiling than ritual impurity (from food contact).