Jerome — as excerpted in the Catena Aurea on Mark 7:1-13

“(in Matt. 15) Wonderful is the folly of the Pharisees and Scribes; they accuse the Son of God, because He keeps not the traditions and precepts of men. But common is here put for unclean; for the people of the Jews, boasting that they were the portion of God, called those meats common, which all made use of.”