Matthew 16:1-4 New American Standard Bible (NASB)

16 The Pharisees and Sadducees came up, and testing Jesus, they asked Him to show them a sign from heaven. ² But He replied to them, “When it is evening, you say, ‘It will be fair weather, for the sky is red.’³ And in the morning, ‘There will be a storm today, for the sky is red and threatening.’ Do you know how to discern the appearance of the sky, but cannot discern the signs of the times? ⁴ An evil and adulterous generation seeks after a sign; and a sign will not be given it, except the sign of Jonah.” And He left them and went away.

15 Then some Pharisees and scribes came to Jesus from Jerusalem and said, ² “Why do Your disciples break the tradition of the elders? For they do not wash their hands when they eat bread.” ³ And He answered and said to them, “Why do you yourselves transgress the commandment of God for the sake of your tradition? ⁴ For God said, ‘Honor your father and mother,’ and, ‘He who speaks evil of father or mother is to be put to death.’ ⁵ But you say, ‘Whoever says to his father or mother, “Whatever I have that would help you has been given to God,” ⁶ he is not to honor his father or his mother.’ And by this you invalidated the word of God for the sake of your tradition. ⁷ You hypocrites, rightly did Isaiah prophesy of you 8 ‘This people honors Me with their lips,But their heart is far away from Me. ⁹ ‘But in vain do they worship Me,Teaching as doctrines the precepts of men.’”¹⁰ After Jesus called the crowd to Him, He said to them, “Hear and understand. ¹¹ It is not what enters into the mouth that defiles the man, but what proceeds out of the mouth, this defiles the man.” 

¹² Then the disciples came and said to Him, “Do You know that the Pharisees were offended when they heard this statement?” ¹³ But He answered and said, “Every plant which My heavenly Father did not plant shall be uprooted. ¹⁴ Let them alone; they are blind guides of the blind. And if a blind man guides a blind man, both will fall into a pit.”

¹⁵ Peter said to Him, “Explain the parable to us.” ¹⁶ Jesus said, “Are you still lacking in understanding also? ¹⁷ Do you not understand that everything that goes into the mouth passes into the stomach, and is eliminated? ¹⁸ But the things that proceed out of the mouth come from the heart, and those defile the man. ¹⁹ For out of the heart come evil thoughts, murders, adulteries, fornications, thefts, false witness, slanders. ²⁰ These are the things which defile the man; but to eat with unwashed hands does not defile the man.”