This is what the LORD says: By this you will know that I am the LORD. Behold, with the staff in my hand I will strike the water of the Nile, and it will turn to blood.
KJV
Thus saith the LORD, In this thou shalt know that I [am] the LORD: behold, I will smite with the rod that [is] in mine hand upon the waters which [are] in the river, and they shall be turned to blood.
ASV
Thus saith Jehovah, In this thou shalt know that I am Jehovah: behold, I will smite with the rod that is in my hand upon the waters which are in the river, and they shall be turned to blood.