Mark 7:14-23
14 And he called the people to him again and said to them, “Hear me, all of you, and understand: 15 There is nothing outside a person that by going into him can defile him, but the things that come out of a person are what defile him.” 17 And when he had entered the house and left the people, his disciples asked him about the parable. 18 And he said to them, “Then are you also without understanding? Do you not see that whatever goes into a person from outside cannot defile him, 19 since it enters not his heart but his stomach, and is expelled?” (Thus he declared all foods clean.) 20 And he said, “What comes out of a person is what defiles him. 21 For from within, out of the heart of man, come evil thoughts, sexual immorality, theft, murder, adultery, 22 coveting, wickedness, deceit, sensuality, envy, slander, pride, foolishness. 23 All these evil things come from within, and they defile a person.”
Luke 6:43-45
43 “For no good tree bears bad fruit, nor again does a bad tree bear good fruit, 44 for each tree is known by its own fruit. For figs are not gathered from thornbushes, nor are grapes picked from a bramble bush. 45 The good person out of the good treasure of his heart produces good, and the evil person out of his evil treasure produces evil, for out of the abundance of the heart his mouth speaks.
Matthew 15:7-9
7 You hypocrites! Well did Isaiah prophesy of you, when he said: 8 “‘This people honors me with their lips, but their heart is far from me; 9 in vain do they worship me, teaching as doctrines the commandments of men.’”