Exodus 7:18-20

Young's Literal Translation

¹⁸ and the fish that [are] in the River die, and the River hath stank, and the Egyptians have been wearied of drinking waters from the River.'

¹⁹ And Jehovah saith unto Moses, `Say unto Aaron, Take thy rod, and stretch out thy hand against the waters of Egypt, against their streams, against their rivers, and against their ponds, and against all their collections of waters; and they are blood -- and there hath been blood in all the land of Egypt, both in [vessels of] wood, and in [those of] stone.'

²⁰ And Moses and Aaron do so, as Jehovah hath commanded, and he lifteth up [his hand] with the rod, and smiteth the waters which [are] in the River, before the eyes of Pharaoh, and before the eyes of his servants, and all the waters which [are] in the River are turned to blood,