Exodus 7:3-12

7:3 But I will harden Pharaoh’s heart, and although I will multiply my signs and my wonders in the land of Egypt, 7:4 Pharaoh will not listen to you. I will reach into Egypt and bring out my regiments, my people the Israelites, from the land of Egypt with great acts of judgment. 7:5 Then the Egyptians will know that I am the Lord, when I extend my hand over Egypt and bring the Israelites out from among them.

7:6 And Moses and Aaron did so; they did just as the Lord commanded them. 7:7 Now Moses was eighty years old and Aaron was eighty-three years old when they spoke to Pharaoh.

7:8 The Lord said to Moses and Aaron, 7:9 “When Pharaoh says to you, ‘Do a miracle,’ and you say to Aaron, ‘Take your staff and throw it down before Pharaoh,’ it will become a snake.” 7:10 When Moses and Aaron went to Pharaoh, they did so, just as the Lord had commanded them – Aaron threw down his staff before Pharaoh and his servants and it became a snake. 7:11 Then Pharaoh also summoned wise men and sorcerers, and the magicians of Egypt by their secret arts did the same thing. 7:12 Each man threw down his staff, and the staffs became snakes. But Aaron’s staff swallowed up their staffs.