Shemot 7:21-23

Orthodox Jewish Bible

²¹ And the dag (fish) that was in the Nile died; and the Nile stank, and the Egyptians could not drink of the mayim of the Nile; and there was dahm throughout kol Eretz Mitzrayim.

²² And the kharetumei Mitzrayim did so with their secret lore: and lev Pharaoh was hardened, neither did he pay heed unto them; as Hashem had said.

²³ And Pharaoh turned and went into his bais, neither did he set his mind to this also.