What does Exodus 10:13 mean?
Locusts are a particular form taken on by grasshoppers. In this state, they become more aggressive, hungrier, driven to gather in swarms, and eager to breed. Relatively small groups quickly join, often forming enormous clouds of insatiable insects. Such plagues have consumed crops and created disaster for thousands of years. Here, Moses gives the signal (Exodus 10:12) to unleash the worst plague of locusts Egypt has ever seen (Exodus 10:4–6). This will take away what little was left after the recent hailstorm (Exodus 9:24–25, 31–32).God uses a wind to bring the locusts into Egypt. This may have caused many large swarms to join into a single gigantic army. By the following morning (Exodus 10:4), Egypt is covered with so many locusts that they block out the sun. The Lord also works through His commands to Moses, such as gesturing with his staff (Exodus 8:6; 9:33). But only God's will and power create these events (Exodus 3:20; 10:1–2). Weather and prophets are just tools He uses to accomplish His will.
Moses' staff is a recurring object in the book of Exodus (Exodus 4:2, 20; 7:9, 15; 8:5, 16; 9:23; 14:16). Even after Israel leaves Egypt, this staff will feature in many key events (Exodus 17:5, 9).