Exodus 11:4

‘And I will go through the land of Egypt on that night and will strike down all the firstborn in the land of Egypt, both man and beast; and against all the gods of Egypt I will execute judgments—I am Yahweh.

“And Yahweh will pass through to smite the Egyptians; and He will see the blood on the lintel and on the two doorposts, and Yahweh will pass over the doorway and will not allow the destroyer to come into your houses to smite you.

Now it happened at midnight that Yahweh struck all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the dungeon, and all the firstborn of cattle.

“Then You performed signs and wonders against Pharaoh, Against all his servants and all the people of his land; For You knew that they acted presumptuously toward them, And made a name for Yourself as it is this day.

He established it for a testimony in Joseph When he went forth over the land of Egypt. I heard a language that I did not know: