Exodus 12:29

“So I said to you, ‘Let My son go that he may serve Me’; but you have refused to let him go. Behold, I will kill your son, your firstborn.”’”

So Moses said, “Thus says Yahweh, ‘About midnight I am going out into the midst of Egypt,

and all the firstborn in the land of Egypt shall die, from the firstborn of the Pharaoh who sits on his throne, even to the firstborn of the servant-girl who is behind the millstones; and all the firstborn of the cattle.

‘And it happened, when Pharaoh hardened his heart with stiffness about letting us go, that Yahweh killed every firstborn in the land of Egypt, both the firstborn of man and the firstborn of beast. Therefore, I sacrifice to Yahweh the males, the first offspring of every womb, but every firstborn of my sons I redeem.’

“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.

“In a moment they die, and at midnight People are shaken and pass away, And the mighty are taken away without a hand.

He leveled a path for His anger; He did not hold back their soul from death, But gave over their life to the plague,

So He struck all the firstborn in Egypt, The first of their vigor in the tents of Ham.

He also struck down all the firstborn in their land, The first of all their vigor.

To Him who struck the Egyptians through their firstborn, For His lovingkindness endures forever,

Before Him goes pestilence, And plague comes after Him.

By faith he kept the Passover and the sprinkling of the blood, so that he who destroyed the firstborn would not touch them.

Death of the Firstborn of Egypt