Exodus 8:21 - Exposition

Swarms of flies is an unfortunate translation of a single substantive in the singular number, accompanied by the article. A mixture , etc; is nearly as bad. The writer must mean some one definite species of animal, which he called "the 'arob. " On the probable identification of the animal, see the Introductory paragraph to this Chapter. And also the ground . The 'arob , like the frogs, was to plague them both inside their houses and outside, but especially inside.