Mostly in the Bible "the Law" refers not only to the Ten Commandments but to the entire set of prescriptions that governed Jewish life in particular circumcision.These were superseded in the New Law.
As for the Ten commandments, Jesus did not cancel the commandments of the Law, but added "If you wish to be perfect sell all you have..and you will have treasure in heaven....."(Mark 10:17-22) Also he asked the lawyer
"What is written in your law?" and when he said it was to love God and your neighbour: Jesus said: "You have answered rightly, DO THIS AND LIFE IS YOURS".(Luke 10 25-28) Jesus also spoke of His own laws and commandments: "If you keep my commandments, you will remain in my love" and again "This is my COMMANDMENT, love one another as I have loved you".(John 15:10-12) and "Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfil".(Matthew 5:17) and: "I have NOT come to abolish the law and the prophets but to fulfil them".
It is not correct to say that 'There are no rules, laws or religion for the Christian'. Christians are not free from the duty of obeying the Ten Commandments of the Old Testament, in fact we are subject to the much more demanding and comprehensive law of LOVE. God still requires us to imitate Christ in His absolute OBEDIENCE to the will of His Father. Patrick Cronin