וְסִכְסַכְתִּ֤י מִצְרַ֙יִם֙ בְּמִצְרַ֔יִם וְנִלְחֲמ֥וּ אִישׁ־בְּאָחִ֖יו וְאִ֣ישׁ בְּרֵעֵ֑הוּ עִ֣יר בְּעִ֔יר מַמְלָכָ֖ה בְּמַמְלָכָֽה׃
Rashi on Isaiah
And I will stir up Egyptians against Egyptians The end of the verse explains its beginning: And they shall war one man against his brother.