At this point in the Israelites’ story, the Jews are captives in Israel. Moses, the Egyptian prince-turned-shepherd, has approached Pharaoh nine times with the same plea straight from the mouth of the Lord: “Let my people go.” Each time, Pharaoh has refused and a plague has come upon the Egyptians. Now the Lord is giving directions to Moses for how to prepare His people for the final plague which will eventually convince Pharaoh to, at long last, let God’s people go.