Moses
Exodus 7:21ESV·traditional attribution

And the fish in the Nile died, and the Nile stank, so that the Egyptians could not drink water from the Nile. There was blood throughout all the land of Egypt.

Matthew Henry Presbyterian

Water turned to blood strikes horror into the soul, but the justice runs deeper: Egypt made an idol of the Nile, and God justly turned their god into a curse. Whatever creature we worship instead of the Creator, the Lord will either remove from us or make bitter to our taste.

AI summary

Commenting on Exodus 7:14-25

John Gill Reformed Baptist

And the fish that was in the river died,.... Which was a full proof that the conversion of it into blood was real; for had it been only in appearance, or the water of the river had only the colour of blood, and looked like it, but was not really so, it would not have affected the fishes, they would have lived as well as...

Geneva Bible Notes Reformed

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. To show that it was a true miracle, God plagued them in that which was most needed for the preservation of life.