8And the LORD spoke to Moses and to Aaron, saying:9For Pharaoh will speak to you, saying, "Give yourselves a wonder; and you shall say to Aaron, 'Take your rod and throw it before Pharaoh; let it become a dragon.'"10And Moses and Aaron came to Pharaoh and did so, just as the LORD commanded; and Aaron threw his rod before Pharaoh and before his servants, and it became a dragon.11And Pharaoh also called the wise men and the sorcerers, and the magicians of Egypt also did so by their flames.12And each man threw his rod, and they became dragons; and Aaron's rod swallowed their rods.13And Pharaoh's heart was hardened, and he would not listen to them, just as the LORD had said.