Exodus 7:17-19

New Catholic Bible

¹⁷ The Lord says, ‘By this you will know that I am the Lord. Behold, I will strike the waters of the Nile with the staff that I have in my hand, and they will change into blood. ¹⁸ The fish in the Nile will die, and the Nile will become putrid so that the Egyptians will not be able to drink from the Nile.” ’ ”

¹⁹ The Lord said to Moses, “Command Aaron, ‘Take your staff and stretch out your hand over the waters of Egypt, over their rivers, their canals, their ponds, and over all their supplies of water. They will turn into blood and there will be blood in all of the land of Egypt, even in their wood and stone jars.’ ”