Please note this important distinction! Every single religion contains portions of the Law. In fact, some unbelievers, by their knowledge of the Law, have advanced so far that they realized their souls need to be cleansed, that their thoughts and desires need to be purified. But only in the Christian religion will you find the Gospel. Other religions do not contain even a speck of it.
Law & Gospel: How to Read and Apply the Bible by C. F. W. Walther (A Reader’s Edition) p 13