Ramban on Vaeira 9:12

English: AND THE ETERNAL HARDENED THE HEART OF PHARAOH. It is possible that during the first plagues, the magicians hardened Pharaoh’s heart in order to pride themselves in their wisdom. But now that they did not come before him and there was none to help him and none to uphold him 208 See Isaiah 63:5. in his folly except his iniquities that ensnared him, 209 See Proverbs 5:22. [it was Hashem Who hardened his heart]. It is possible that Scripture is alluding to that which our Rabbis have explained, 210 Shemoth Rabbah 11:7. i.e., that during the first plagues, the hardening of Pharaoh’s heart was his own doing, 211 And not, as stated before, that it was caused by the magicians, who were proud of their arts. and now it was [rightfully] caused by Hashem, as I have explained above. 212 Above, 7:3. This is th