He turned their waters into blood, and slew their fish.
Ver. 29. And he turned their waters into blood] A just hand of God upon them for their cruelty in drowning the Hebrew infants, and a real forewarning, if they could have seen it, of the death of their firstborn, and their final overthrow at the Red Sea.
And slew their fish] Which was a great part of their food; piscis a pascendo dictus.