Shemot 10:19-21

Orthodox Jewish Bible

¹⁹ And Hashem turned a west ruach chazak me’od, which took away the arbeh, and cast them into the Yam Suf; there remained not one arbeh in all the borders of Mitzrayim.

²⁰ But Hashem hardened lev Pharaoh, so that he would not let the Bnei Yisroel go.

²¹ And Hashem said unto Moshe, Stretch out thine yad toward Shomayim, that there may be choshech over Eretz Mitzrayim, even choshech which he can feel.