Hello, I'm an expert in biblical studies and literature. I can help you with your question regarding the first son of Cain.
In the Bible, specifically in the book of Genesis, it is mentioned that Cain had a son named Enoch. However, this is not to be confused with the Enoch who was the great-grandfather of Noah. Cain's son Enoch is mentioned in Genesis 4:17, which states:
"And Cain knew his wife, and she conceived and bore Enoch. And he built a city, and called the name of the city after the name of his son, Enoch."
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