Then the Lord said to Moses and Aaron,
Moses was eighty years old, and Aaron was eighty-three when they made their demands to Pharaoh.
“Pharaoh will demand, ‘Show me a miracle.’ When he does this, say to Aaron, ‘Take your staff and throw it down in front of Pharaoh, and it will become a serpent.’”
They didn’t see the miraculous signs and wonders he performed in Egypt against Pharaoh and all his land.