Exodus 7:20-22

Revised Standard Version

²⁰ Moses and Aaron did as the Lord commanded; in the sight of Pharaoh and in the sight of his servants, he lifted up the rod and struck the water that was in the Nile, and all the water that was in the Nile turned to blood. ²¹ And the fish in the Nile died; and the Nile became foul, so that the Egyptians could not drink water from the Nile; and there was blood throughout all the land of Egypt. ²² But the magicians of Egypt did the same by their secret arts; so Pharaoh’s heart remained hardened, and he would not listen to them; as the Lord had said.