When the Bible speaks of the Law, it refers to the Mosaic Law…the Ten Commandments and the 613 laws that come from it. Most of these laws are outlined in the book of Leviticus. The Mosaic Law was part of a covenant between God and the ancient Israelites, and is no longer in effect.
What is the relationship between Christianity and the Law of Moses? This is an area in which many Christians struggle, but they shouldn't.