Andrew of Caesarea
By the permission of God, the River Euphrates may be diminished in its waters, in order to give passage to pagan kings for the destruction of one another and of men.
We think they will rise from the Scythian regions, the place of Gog and Magog, as Revelation says further on.
But perhaps the antichrist, being of the Jews, will come from the eastern part of the Persian land, where the tribe of Dan is. With other kings and nobles who have inherited the royal name, he will cross the Euphrates.
He will bring upon men the death of soul and body: upon some because of their patience and faith, and upon others because of weakness and lack of courage.