Shemot 9:5-7

Orthodox Jewish Bible

⁵ And Hashem appointed a mo’ed, saying, Tomorrow Hashem shall do this thing in the land.

⁶ And Hashem did that thing on the next day, and all the mikneh of Mitzrayim died; but of the mikneh of the Bnei Yisroel died not one.

⁷ And Pharaoh sent, and, hinei, there was not one of the mikneh Yisroel dead. And the lev Pharaoh was hardened, and he did not let HaAm go.