In Matthew 15, Which of God's commands did Jesus criticize the Pharisees for not obeying?

The commandment to kill children who curse their parents

(See Exodus 21:15, Leviticus 20:9, Deuteronomy 21:18-21)
But he answered and said unto them, Why do ye also transgress the commandment of God by your tradition?

For God commanded, saying, Honour thy father and mother: and, He that curseth father or mother, let him die the death.

But ye say, Whosoever shall say to his father or his mother, It is a gift, by whatsoever thou mightest be profited by me;

And honour not his father or his mother, he shall be free. Thus have ye made the commandment of God of none effect by your tradition. Matthew 15:3-6