Psalm 105:36
He smote also all the firstborn in their land, the chief of all their strength.
Genesis 49:3
Reuben, thou art my firstborn, my might, and the beginning of my strength, principal in dignity, and the principal in power.
Psalm 78:51
and smote all the firstborn in Egypt, the firstfruits of their strength in the tents of Ham:
Psalm 135:8
He who smote the firstborn of Egypt, both of man and beast;
Psalm 136:10
To him that smote Egypt in their firstborn: for his mercy endures for ever:
Exodus 4:23
And I have said unto thee, Let my son go that he may serve me, but thou hast refused to let him go; therefore, behold, I will slay thy son, even thy firstborn.
Exodus 11:4-5
And Moses said, The LORD hath said thus, About midnight I will go out into the midst of Egypt,
Exodus 12:12
For I will pass through the land of Egypt this night and will smite all the firstborn in the land of Egypt, both among man and beast; and against all the gods of Egypt I will execute judgments: I am the LORD.
Exodus 12:29-30
And it came to pass, that at midnight the LORD smote all the firstborn in the land of Egypt, from the firstborn of Pharaoh that sat on his throne unto the firstborn of the captive that was in the dungeon, and all the firstborn of the animals.
Hebrews 11:28
By faith he kept the passover and the sprinkling of the blood lest he that destroyed the firstborn should touch them.