Psalms 78:51

78:51 He struck down all the firstborn in Egypt,

the firstfruits of their reproductive power in the tents of Ham.

Psalms 135:8

135:8 He struck down the firstborn of Egypt,

including both men and animals.

Psalms 136:10

136:10 to the one who struck down the firstborn of Egypt,

for his loyal love endures,

Exodus 4:23

4:23 and I said to you, ‘Let my son go that he may serve me,’ but since you have refused to let him go, I will surely kill your son, your firstborn!”’”

Exodus 11:4-5

11:4 Moses said, “Thus says the Lord: ‘About midnight I will go throughout Egypt, 11:5 and all the firstborn in the land of Egypt will die, from the firstborn son of Pharaoh who sits on his throne, to the firstborn son of the slave girl who is at her hand mill, and all the firstborn of the cattle.

Exodus 12:12

12:12 I will pass through the land of Egypt in the same night, and I will attack all the firstborn in the land of Egypt, both of humans and of animals, and on all the gods of Egypt I will execute judgment. I am the Lord.

Exodus 12:29-30

The Deliverance from Egypt

12:29 It happened at midnight – the Lord attacked 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 prison, and all the firstborn of the cattle. 12:30 Pharaoh got up in the night, along with all his servants and all Egypt, and there was a great cry in Egypt, for there was no house in which there was not someone dead.

Hebrews 11:28

11:28 By faith he kept the Passover and the sprinkling of the blood, so that the one who destroyed the firstborn would not touch them.