3. And I will make Pharaoh's heart stubborn and hard, and multiply My signs, My wonders, and miracles in the land of Egypt.
4. But Pharaoh will not listen to you, and I will lay My hand upon Egypt and bring forth My hosts, My people the Israelites, out of the land of Egypt by great acts of judgment.
5. The Egyptians shall know that I am the Lord when I stretch forth My hand upon Egypt and bring out the Israelites from among them.
6. And Moses and Aaron did so, as the Lord commanded them.
7. Now Moses was 80 years old and Aaron 83 years old when they spoke to Pharaoh.
8. And the Lord said to Moses and Aaron,
9. When Pharaoh says to you, Prove [your authority] by a miracle, then tell Aaron, Throw your rod down before Pharaoh, that it may become a serpent.
10. So Moses and Aaron went to Pharaoh and did as the Lord had commanded; Aaron threw down his rod before Pharaoh and his servants, and it became a serpent.