Psalm 105:36
"He smote also all the firstborn in their land, the chief of all their strength."
Cross References (ranked by relevance)
Reuben, thou art my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power:
To him that smote Egypt in their firstborn: for his mercy endureth for ever:
Through faith he kept the passover, and the sprinkling of blood, lest he that destroyed the firstborn should touch them.
And I say unto thee, Let my son go, that he may serve me: and if thou refuse to let him go, behold, I will slay thy son, even thy firstborn.
Who smote the firstborn of Egypt, both of man and beast.
For I will pass through the land of Egypt this night, and will smite all the firstborn in the land of Egypt, both man and beast; and against all the gods of Egypt I will execute judgment: I am the LORD.
And smote all the firstborn in Egypt; the chief of their strength in the tabernacles of Ham: