Exodus 12:1 - Albert Barnes' Notes on the Bible

This chapter was written some time after the Exodus, probably when Moses put together the portions of the book toward the end of his life. The statements that these instructions were given in the land of Egypt, and that they were given to Moses and Aaron, are important: the one marks the special dignity of this ordinance, which was established before the Sinaitic code; the other marks the distinction between Moses and Aaron and all other prophets. They alone were prophets of the law, i. e. no law was promulgated by any other prophets.