The Law as used throughout the Bible generally but not invariably refers to the Law of Moses. In a wider sense it is used to refer to the five ‘Books of Moses’, the Pentateuch; and in its widest sense – the whole of the ‘Jewish’ Bible or Old Testament.
Paul wrote to the Galatians who had been infiltrated by Jews trying to persuade them to keep the Law: ‘I’ll say it again. If you are trying to find favor with God by being circumcised, you must obey every regulation in the whole law of Moses.’ And the brother of Jesus is recorded as writing: ‘For whoever keeps the whole law and yet stumbles at just one point is guilty of breaking all of it.’ Nowadays no-one keeps the whole law. Despite the fact that it exists in the Bible as a unit. Even the Jews who would try to keep it all if they could are not able to, because they have no Temple, no Ark of the Covenant and no Levitical priesthood.
Most of the objections to ‘Grace’ discussed here are from people advocating keeping various ‘parts’ of the law. Parts which have no Biblical mandate for being divorced from the whole.