These two words mean basically thesame thing and refer to the miraculous troubles that God had caused in Egypt. (See: [[rc://en/ta/man/translate/figs-doublet]])
The psalmist speaks as if the people of Egypt were listening to him. Alternate translation: "among you people of Egypt" or "among the people of Egypt" (See: [[rc://en/ta/man/translate/figs-apostrophe]])