Exodus 7:8-12

8Then the  Lord said to Moses and Aaron, 9“When Pharaoh says to you, a  Prove yourselves by working a miracle,’ then you shall say to Aaron, ‘Take your staff and cast it down before Pharaoh, that it may become a serpent.’” 10So Moses and Aaron went to Pharaoh and did just as the  Lord commanded. Aaron cast down his staff before Pharaoh and his servants, and it became a serpent. 11Then Pharaoh summoned the wise men and the sorcerers, and they, the b  magicians of Egypt, also c  did the same by their secret arts. 12For each man cast down his staff, and they became serpents. But Aaron’s staff swallowed up their staffs.
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