Exodus 11:4-5

MSTC(i) 4 And Moses said, "Thus sayeth the LORD, 'About midnight will I go out among the Egyptians, 5 and all the firstborn in the land of Egypt shall die: even from the firstborn of Pharaoh that sitteth on his seat, unto the firstborn of the maidservant that is in the mill, and all the firstborn of the cattle.