8 You have let go of the commands of God and are holding on to human traditions.”
9 And he continued, “You have a fine way of setting aside the commands of God in order to observe[c] your own traditions! 10 For Moses said, ‘Honor your father and mother,’[d] and, ‘Anyone who curses their father or mother is to be put to death.’[e]11 But you say that if anyone declares that what might have been used to help their father or mother is Corban (that is, devoted to God)— 12 then you no longer let them do anything for their father or mother. 13 Thus you nullify the word of God by your tradition that you have handed down.”
The clear meaning here is that they are hypocrites for not killing children for cursing mother or father. Apparently, the Pharisees had a much gentler interpretation of the Law than did our little boy Jesus.