Matthew 12:1 -30 I am Lord of the Sabbath

Jesus Christ stays within the Law of the Sabbath being the High priests and the disciples being His followers. Jesus also shows us the power in authority under God by delivering a demon that was blind and mute. Under the exorcism of Judaism within the three categories of things to do with a successful deliverance of devils, one must get the demons name to call it out. How can one deliver one person who the demon doesn't allow them to speak? Only one can, that will be the Messiah. The people spake," Is this not the son of David'?