English Standard Version
Chapter 7
5 The Egyptians shall know that I am the LORD, when I stretch out my hand against Egypt and bring out the people of Israel from among them.”
6 Moses and Aaron did so; they did just as the LORD commanded them.
7 Now Moses was eighty years old, and Aaron eighty-three years old, when they spoke to Pharaoh.
8 Then the LORD said to Moses and Aaron,
9 “When Pharaoh says to you, ‘Prove yourselves by working a miracle,’ then you shall say to Aaron, ‘Take your staff and cast it down before Pharaoh, that it may become a serpent.’”
10 So Moses and Aaron went to Pharaoh and did just as the LORD commanded. Aaron cast down his staff before Pharaoh and his servants, and it became a serpent.