3 Yet I will make Pharaoh so headstrong that, despite the many signs and wonders that I work in the land of Egypt,
4 Pharaoh will not listen to you. Therefore I will lay my hand on Egypt and with mighty acts of judgment I will bring my armies, my people the Israelites, out of the land of Egypt.
5 All Egyptians will know that I am the Lord, when I stretch out my hand against Egypt and bring the Israelites out of their midst.
6 This, then, is what Moses and Aaron did. They did exactly as the Lord had commanded them.
7 Moses was eighty years old, and Aaron eighty-three, when they spoke to Pharaoh.
8 The Lord spoke to Moses and Aaron:
9 When Pharaoh demands of you, “Produce a sign or wonder,” you will say to Aaron: “Take your staff and throw it down before Pharaoh, and it will turn into a serpent.”