Exodus 4:23

and therefore sayeth unto thee: let my son go, that he may serve me. If thou wilt not let him go: behold, I will slay thine eldest son.'"

Exodus 11:5

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.

Exodus 12:29

And at midnight the LORD smote all the firstborn in the land of Egypt: from the firstborn of Pharaoh that sat on his seat, unto the firstborn of the captive that was in prison, and all firstborn of the cattle.

Psalm 105:36

He smote all the firstborn in their land, even the chief of all their strength.

Psalm 135:8

He smote the firstborn of Egypt, both of man and of beast.

Exodus 5:1

Then Moses and Aaron went and told Pharaoh, "Thus sayeth the LORD God of Israel: 'Let my people go, that they may keep holy day unto me in the wilderness.'"

Exodus 7:16

And say unto him, 'The LORD God of the Hebrews hath sent me unto thee saying: let my people go, that they may serve me in the wilderness: but hitherto thou wouldest not hear.

Psalm 78:51

When he smote all the firstborn in Egypt, the most principal and mightiest in the dwellings of Ham.

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