Supernatural - Chapter 8 Part 1

The Israelites spent over a year at Mount Sinai. Why so long? They had already entered into a covenant with God and received the Ten Commandments. But they still had a lot to learn. It was one thing to promise to believe in and be loyal to the God of their ancestors, Abraham, Isaac, and Jacob. It was another to know what God expected and what he was like.
(from the book)