1 Then Jesus spoke to the multitude, and to his disciples,
Matthew 23:1 Cross References - RKJNT
Matthew 15:10-20
10 And he called the multitude, and said to them, Hear, and understand:
11 Not that which goes into the mouth defiles a man; but that which comes out of the mouth, this defiles a man.
12 Then his disciples came, and said to him, Do you know that the Pharisees were offended, after they heard this saying?
13 But he answered and said, Every plant which my heavenly Father has not planted shall be rooted up.
14 Let them alone: they are blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.
15 Then Peter answered and said to him, Explain to us this parable.
16 And Jesus said, Are you also still without understanding?
17 Do you not yet understand, that whatever enters in at the mouth goes into the belly, and is eliminated?
18 But those things which proceed out of the mouth come forth from the heart; and they defile the man.
19 For out of the heart proceed evil thoughts, murders, adulteries, sexual immorality, thefts, false witness, slanders:
20 These are the things which defile a man: but to eat with unwashed hands does not defile a man.
Mark 7:14
14 And when he had called all the people to him, he said to them, Listen to me, every one of you, and understand:
Mark 12:38-39
Luke 12:1
1 In the meantime, when a great crowd of people had gathered, so that they trod upon each other, he began to say first to his disciples, Beware of the leaven of the Pharisees, which is hypocrisy.
Luke 12:57
57 And why do you not even judge for yourselves what is right?