18. And he went out from Pharaoh, and entreated Hashem.
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.
22. And Moshe stretched forth his yad toward Shomayim; and there was a thick choshech in kol Eretz Mitzrayim shloshet yamim;
23. They saw not one another, neither rose any from his place for shloshet yamim; but kol Bnei Yisroel had Ohr in their dwellings.