Or HaChaim on Exodus 9:16/אור החיים על שמות ט׳:ט״ז

1 בעבור תדע..ולמען תספר שמי בכל הארץ….בעבור הראותך את כתי. "In order that you should know….in order to show you My power…and in order that you will proclaim My name in the whole land, etc." You who have said: "who is G'd?" will now be the first one to proclaim My name all over the earth. Obviously, Pharaoh did not have the kind of communications media which are at our disposal today. The Torah means that as a result of what would happen to Pharaoh he would be the instrument through which the whole of mankind would become aware of what G'd does to those who refuse to accept His orders. Even nowadays kings have been heard to say that if the Jewish Messiah arrives and performs a miracle they would not repeat Pharaoh's mistakes.