Antoninus asked Rabbeinu Hakadosh: I want to go to Alexandria. Is it possible that a king will arise there who will beat me? He answered: I do not know. In any event, we have it in writing that Egypt is incapable of establishing either a king or a governor, viz. (Ezekiel 29:15) "Of all the kingdoms it (Egypt) will be the lowest, and it will not exalt itself again among the nations. And I will diminish them, so that they not dominate the nations."
Antoninus Asked Rabbeinu Hakadosh I Want to Go to Alexandria
Mekhilta Tractate Shirah 6:15