Parallel
Exodus 7:17
Brenton's English Septuagint · Berean Standard Bible
These things saith the Lord: Hereby shalt thou know that I am the Lord: behold, I strike with the rod that is in my hand on the water which is in the river, and it shall change it into blood.
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.