Exodus 7:12-16

For each one threw down his staff, and they turned into serpents. But Aaron’s staff swallowed their staffs.

Yet Pharaoh’s heart was hardened, and he did not listen to them, just as the Lord had said. Water Turned into Blood

Then the Lord said to Moses, “Pharaoh’s heart is stubborn; he refuses to let the people go.

Go to Pharaoh in the morning just as he is going out to the water, and position yourself to meet him on the bank of the Nile; and you shall take in your hand the staff that was turned into a serpent.

And you shall say to him, ‘The Lord, the God of the Hebrews, sent me to you, saying, “Let My people go, so that they may serve Me in the wilderness. But behold, you have not listened up to now.”