What does Exodus 8:16 mean?
This verse begins the account of the third plague (Exodus 7:21–23; 8:6), usually labeled with the English word "gnats" (Exodus 8:17–19). The Hebrew word used here is kinnim', related to a root word implying "attaching" or "fastening." This may refer to the insects modern people call fleas, lice, or possibly mosquitoes. These are some species—or several—of swarming, irritating insects. These would be a nuisance, as well as spreading disease and contaminating food and water. The swarms are prolific. "All the dust of the earth," so it seemed, was these insects (Exodus 8:17). This is almost certainly a metaphor, indicating that the bugs covered every surface and got into every space: just as ever-present as the dust in Egypt's desert climate.God's action of sending "gnats" does not come with a warning, as did the previous two plagues (Exodus 7:16–17; 8:2–3). Perhaps Pharaoh was meant to see the obvious source of the plague and reach out to Moses to free the Israelites (Exodus 5:1–3). This fits the reaction of Egypt's royal sorcerers (Exodus 8:19).