Exodus 12:29-31

Young's Literal Translation

²⁹ And it cometh to pass, at midnight, that Jehovah hath smitten every first-born in the land of Egypt, from the first-born of Pharaoh who is sitting on his throne, unto the first-born of the captive who [is] in the prison-house, and every first-born of beasts.

³⁰ And Pharaoh riseth by night, he and all his servants, and all the Egyptians, and there is a great cry in Egypt, for there is not a house where there is not [one] dead,

³¹ and he calleth for Moses and for Aaron by night, and saith, `Rise, go out from the midst of my people, both ye and the sons of Israel, and go, serve Jehovah according to your word;