Here "set fire" is an idiom meaning "start a fire." Alternate translation: "I will start a fire in Egypt" (See: [[rc://en/ta/man/translate/figs-idiom]])
Here "Pelusium" is a metonym for the people of the city near Pelusium, and "be in great agony" can be translated with the verb "suffer." Alternate translation: "The people of Pelusium will suffer terribly" or "The people of Pelusium will feel terrible pain" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-abstractnouns]])
This can be stated in active form. Alternate translation: "enemies will break up the walls and buildings in Thebes" or "enemies will destroy the Thebes" (See: [[rc://en/ta/man/translate/figs-activepassive]])
Here "face enemies" represents seeing or having enemies. The name of the city is a metonym for the people who live in the city. Alternate translation: "The people of Memphis will have enemies every day" or "Enemies will fight against the people of Memphis every day" (See: [[rc://en/ta/man/translate/figs-metonymy]])