Exodus itself does not at any point identify the person responsible for authoring or editing the book as we now have it. Taken at face value Exodus occasionally ascribes the composition of particular sections to individuals who are also characters within the story. In Exodus 15, it seems likely that Miriam composes the song used by the Israelites to celebrate their rescue from the Egyptian army. In Exodus 20, the Ten Commandments are attributed to God, who speaks them directly to the people.