For 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. (ASV)
Note the reference to the "gods of Egypt": the Hebrews originally believed in the existence of many gods. For more on this topic, see the Deuteronomy 32:8 section.
Edit this section if you doubt error.
Edit this section to note miscellaneous facts.