פירוש על קידושין 135:11

The rabbis don’t interpret the two wives as being prohibited by positive commandments because this would not fit the verse. If both are Egyptian (a positive commandment prohibition) then both are hated. If one is Egyptian and one a Jew, then both need to be from the same nation. And if the verse refers to the prohibition of a non-virgin to a High Priest, well the verse says “man” not “priest.”