This plague was. severe blow to all idolatrous worship and worshippers. Cleanliness was imperative. For this cause the priests wore linen, and shaved daily. Moreover, it was designed to destroy the worship of Beelzebub, the god of flies, and to manifest his impotence. Compare Exodus 12:12.
the LORD (Hebrew. Jehovah) said. See note on Exodus 3:7, and compare note on Exodus 6:10.
lo. Figure of speech Asterismos (App-6) for emphasis.