Matthew 22:34–40: The Greatest Commandment
Jesus answers a testing lawyer by naming love for God and love for neighbor as the load-bearing center of the law, not an addition to it. The whole law and the prophets hang on these two.
Matthew 5:17–20: Jesus Fulfills the Law
Jesus does not cancel the law and the prophets but fulfills them, and he calls his disciples to a righteousness that goes beyond that of the scribes and Pharisees.