Mark 7:15-19

there is nothing outside a man [such as food] which by going into him can defile him [morally or spiritually]; but the things which come out of [the heart of] a man are what defile and dishonor him. [If anyone has ears to hear, let him hear.”] 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.)