Adonai told Moses and Aaron,
Moses was eighty years old and Aaron eighty-three years old when they spoke to Pharaoh.
“When Pharaoh speaks to you saying, ‘Prove yourselves with a miracle,’ then you are to say to Aaron, ‘Take your staff and cast it down before Pharaoh, so that it may become a serpent.’”
His signs and the deeds He did in the midst of Egypt to Pharaoh king of Egypt and to all his land;