Exodus 7:18; Exodus 7:21

18 The fish in the Nile shall die, and the Nile will stink, and the Egyptians will fgrow weary of drinking water from the Nile.

21 And the fish in the Nile died, and the Nile stank, so that the Egyptians jcould not drink water from the Nile. There was blood throughout all the land of Egypt.