Mark 7:17-19

When Jesus had left the crowd and gone into the house, His disciples asked Him about the parable. And He said to them, “Are you, too, so foolish and lacking in understanding? Do you not understand that whatever goes into the man from outside cannot defile and dishonor him, since it does not enter his heart, but [only] his stomach, and [from there it] is eliminated?” (By this, He declared all foods ceremonially clean.)