a serpent] So Exodus 4:3. where the word is Nahash, as Genesis 3:1. but in this place the word is Tauvin, which is used for the whole, Genesis 1:21. here it is translated Pragon, by learned Hebricians, so also Malachi 1:3. and vers. 10. 22. Belike, the change before Pharaoh was not into an ordinary serpent, (called Nahash) but into some greater creature, as a Dragon, or Crocodile.