Origen

“ But it is to be observed that the Jews, who claim for themselves a correct understanding of the law of Moses, carefully restrict their food to such things as are accounted clean, and abstain from those that are unclean. They also do not use in their food the blood of an animal nor the flesh of an animal torn by wild beasts, and some other things which it would take too long for us at present to detail. ”

“ But Jesus, wishing to lead all men by His teaching to the pure worship and service of God, and anxious not to throw any hindrance in the way of many who might be benefited by Christianity, through the imposition of a burdensome code of rules in regard to food, has laid it down, that “not that which goeth into the mouth defileth a man, but that which cometh out of the mouth ”