And afterward Moses and Aaron went in, and told Pharaoh, Thus says the LORD God of Israel, Let my people go, that they may hold a feast unto me in the wilderness.
You therefore prepare yourself, and arise, and speak unto them all that I command you: be not dismayed at their faces, lest I confound you before them.
You shall not add unto the word which I command you, neither shall you take away from it, that you may keep the commandments of the LORD your God which I command you.