So Moses and Aaron went in to Pharaoh, and they did so, just as the Lord commanded. And Aaron cast down his rod before Pharaoh and before his servants, and it became a serpent.
And though they hide themselves on top of Carmel, From there I will search and take them; Though they hide from My sight at the bottom of the sea, From there I will command the serpent, and it shall bite them;
“When Pharaoh speaks to you, saying, ‘Show a miracle for yourselves,’ then you shall say to Aaron, ‘Take your rod and cast it before Pharaoh, and let it become a serpent.’ ”
Go to Pharaoh in the morning, when he goes out to the water, and you shall stand by the river’s bank to meet him; and the rod which was turned to a serpent you shall take in your hand.
And Moses and Aaron did so, just as the Lord commanded. So he lifted up the rod and struck the waters that were in the river, in the sight of Pharaoh and in the sight of his servants. And all the waters that were in the river were turned to blood.