First, there is a law which the Bible calls the law of Moses . This law was a ceremonial law, explaining very precisely how to perform the sacrificial system, and describing the services that had to take place in the earthly sanctuary. For more details, we invite you to review the lesson The Two Sanctuaries . They have rejected the law of the Lord of hosts. The law of the Lord is the second law mentioned in the Bible.
Many points distinguish the ceremonial law from the moral law.
First, the ceremonial law was written by Moses in a book. The moral law, for its part, was written by God Himself on tablets of stone. And you shall put into the ark the Testimony which I will give you. There was nothing in the ark except the two tablets of stone. While the law of Moses was put beside the ark of the covenant, the two tablets of the Ten Commandments were placed inside the ark.