King James Version (KJV) - Exodus 7:21 >

And the fish that [was] in the river died; and the river stank, and the Egyptians could not drink of the water of the river; and there was blood throughout all the land of Egypt.

Jewish Publication Society of America Version (JPS1917) - Exodus 7:21 >

And the fish that were in the river died; and the river became foul, and the Egyptians could not drink water from the river; and the blood was throughout all the land of Egypt.