Exodus 7:20-22 New American Bible (Revised Edition) (NABRE)
20 This, then, is what Moses and Aaron did, exactly as the Lord had commanded. Aaron raised his staff and struck the waters in the Nile in full view of Pharaoh and his servants, and all the water in the Nile was changed into blood. 21 The fish in the Nile died, and the Nile itself stank so that the Egyptians could not drink water from it. There was blood throughout the land of Egypt. 22 But the Egyptian magicians did the same[a] by their magic arts. So Pharaoh hardened his heart and would not listen to them, just as the Lord had said.