And the Egyptians shall know that I am the Lord
 Jehovah, the one only true and living God; this they should know by the judgments executed upon them, and be obliged to acknowledge it: 
 when I stretch forth mine hand upon Egypt:
 especially the last time, to destroy the firstborn: 
 and bring out the children of Israel from among them;
 by which it would appear that he was mightier than they, and obtained the end for which the plagues were inflicted on them.