You shall speak all that I command you, and your brother Aaron shall tell Pharaoh to let the Israelites go out of his land.
But I will harden Pharaoh's heart, and I will multiply my signs and wonders in the land of Egypt.
When Pharaoh does not listen to you, I will lay my hand upon Egypt and bring my people the Israelites, company by company, out of the land of Egypt by great acts of judgment.
The Egyptians shall know that I am the Lord, when I stretch out my hand against Egypt and bring the Israelites out from among them."
Moses and Aaron did so; they did just as the Lord commanded them.
Moses was eighty years old and Aaron eighty-three when they spoke to Pharaoh.
The Lord said to Moses and Aaron,
"When Pharaoh says to you, "Perform a wonder,' then you shall say to Aaron, "Take your staff and throw it down before Pharaoh, and it will become a snake.' "
So Moses and Aaron went to Pharaoh and did as the Lord had commanded; Aaron threw down his staff before Pharaoh and his officials, and it became a snake.
Then Pharaoh summoned the wise men and the sorcerers; and they also, the magicians of Egypt, did the same by their secret arts.
Each one threw down his staff, and they became snakes; but Aaron's staff swallowed up theirs.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (New Revised Standard Bible Version Online)