Where did Cain get the people from to build his city which he named after his son?

The story of Cain and the building of his city is found in the Book of Genesis in the Bible. In Genesis 4:17, it is mentioned that after Cain murdered his brother Abel, he settled in the land of Nod, east of Eden, and built a city there. The specific passage reads:

"Cain made love to his wife, and she became pregnant and gave birth to Enoch. Cain was then building a city, and he named it after his son Enoch."

The Bible does not explicitly state where Cain's wife came from or where the other people in the land of Nod came from. This has led to various interpretations and speculations among theologians and scholars.

Some interpretations suggest that Cain's wife may have been one of his sisters or another close relative, given that Adam and Eve were considered the first human beings in the biblical narrative. Others propose the existence of other humans who were not mentioned in the Bible's creation account, possibly created by God separately from Adam and Eve. Another viewpoint is that the narrative of Cain and his descendants is more symbolic or allegorical rather than strictly historical.

Ultimately, the story of Cain and his descendants in Genesis is part of the larger biblical narrative about human origins, sin, and the consequences of disobedience, rather than a detailed historical account.