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.