Original Verse:
Exodus Chapter 12 Verse 12For I will go through the land of Egypt in that night, and will smite all the first-born in the land of Egypt, both man and beast; and against all the gods of Egypt I will execute judgments: I am Jehovah.

Reference Verses:
Exodus Chapter 11 Verse 5and all the first-born in the land of Egypt shall die, from the first-born of Pharaoh that sitteth upon his throne, even unto the first-born of the maid-servant that is behind the mill; and all the first-born of cattle.
Amos Chapter 5 Verse 17And in all vineyards shall be wailing; for I will pass through the midst of thee, saith Jehovah.
Numbers Chapter 33 Verse 4while the Egyptians were burying all their first-born, whom Jehovah had smitten among them: upon their gods also Jehovah executed judgments.
Psalms Chapter 82 Verse 1(Psalm 82 A Psalm of Asaph.)God standeth in the congregation of God; He judgeth among the gods.
Exodus Chapter 6 Verse 2And God spake unto Moses, and said unto him, I am Jehovah:
Exodus Chapter 18 Verse 11Now I know that Jehovah is greater than all gods; yea, in the thing wherein they dealt proudly against them.