Where did Cain's wife come from in the land of Nod?

Answer 1

Your question presupposes that Cain's wife came from the land of Nod. However, The Bible doesn't say that Cain's wife came from the land of Nod.

What the bible says about the land of Nod, Genesis 4:16, doesn't mention Cain's wife--only that Cain went to live in the Land of Nod.

What the bible says about Cain's wife, Genesis 4:17, doesn't mention the land of Nod, only that Cain and his wife had a son named Enoch, and built a city named after him.

However, the question of where Cain found a wife can be answered logically and scripturally.

From scripture, Genesis 1-5, we find that Adam was the first man created, that a woman was then created and named Eve, that Adam and Eve had many children including Cain, and that Eve was the mother of all living.

Given that Eve was the mother of all living, she was therefore the mother of Cain's wife, who would therefore have also been Cain's sister.

A side note is that no prohibition on sibling marriage appears until later in the law, and, indeed, given that there was one and only one family in existence, for that family to multiply and populate the world would have required marriage that by later standards would have been seen as incestuous.