Clean and Unclean meats?

Mark 7:17-19= Now when he had entered a house away from the crowd, his disciples began to question him respecting the illustration. 18 So he said to them: “Are YOU also without perception like them? Are YOU not aware that nothing from outside that pes into a man can defile him, 19 since it pes, not into [his] heart, but into [his] intestines, and it pes out into the sewer?” Thus he declared all foods clean.