Exodus 6:28 -7:13
8 Then the LORD said to Moses and Aaron, 9 “When Pharaoh says to you, v‘Proveyourselves by working a miracle,’ then you shall say to Aaron, ‘Take your staff and cast itdown before Pharaoh, that it may become a serpent.’” 10 So Moses and Aaron went toPharaoh and did just as the LORD commanded. Aaron cast down his staff before Pharaohand his servants, and it became a serpent. 11 Then Pharaoh summoned the wise men andthe sorcerers, and they, the wmagicians of Egypt, also xdid the same by their secret arts.12 For each man cast down his staff, and they became serpents. But Aaron’s staffswallowed up their staffs. 13 Still rPharaoh’s heart was hardened, and he would not listento them, ras the LORD had said.