Exodus 4:23

And I say to thee, Let my son go, that he may serve me: and if thou shalt refuse to let him go, behold, I will slay thy son, even thy first-born.

Exodus 11:5

And all the first-born in the land of Egypt shall die, from the first-born of Pharaoh that sitteth upon his throne, even to the first-born of the maid-servant that is behind the mill; and all the first-born of beasts.

Exodus 12:29

And it came to pass, that at midnight the LORD smote all the first-born in the land of Egypt, from the first-born of Pharaoh that sat on his throne, to the first-born of the captive that was in the dungeon; and all the first-born of cattle.

Psalm 105:36

He smote also all the first-born in their land, the chief of all their strength.

Psalm 135:8

Who smote the first-born of Egypt, both of man and beast.

Exodus 5:1

And afterward Moses and Aaron went in, and told Pharaoh, Thus saith the LORD God of Israel, Let my people go, that they may hold a feast to me in the wilderness.

Exodus 7:16

And thou shalt say to him, The LORD God of the Hebrews hath sent me to thee, saying, Let my people go, that they may serve me in the wilderness: and behold, hitherto thou wouldest not hear.

Psalm 78:51

And smote all the first-born in Egypt; the chief of their strength in the tabernacles of Ham:

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