‘And I shall pass through the land of Mitsrayim on that night, and shall smite all the first-born in the land of Mitsrayim, both man and beast. And on all the mighty ones of Mitsrayim I shall execute judgment. I am יהוה.
And it came to be at midnight that יהוה smote all the first-born in the land of Mitsrayim, from the first-born of Pharaoh who sat on his throne to the first-born of the captive who was in the dungeon, and all the first-born of livestock.