The family of Jacob who left the promised land and settled in Egypt had now become a great nation, but a nation cannot exist without rules and laws. Before journeying back to the promised land, Israel camped at Sinai, and God gave clear instructions in the Ten Commandments. But we can’t camp at Sinai and remain at Sinai, because the Law shows us our sin and our need to continue our journey to the Cross and open tomb.
Exodus 20:1-21 (The Ten Commandments)
Matthew 5:17-20 (Jesus fulfilled the Law)