Cain had relations with his wife and she conceived, and gave birth to Enoch... (Genesis 4:17)Who was Cain's wife? It is a question often posed to Christians, usually in an attempt to stump them. But the question has a very simple answer... yet some people attempt to avoid the easy answer because it seems... well, too obvious. Some people propose that Adam and Eve were just two of the many humans God made at creation— that the reason Adam and Eve are specifically mentioned in Scripture is because they were the cause of the fall.
However, such reasoning is speculative and unbiblical. While it could be argued that the opening chapters of Genesis do not specifically state that God made only two people at creation, other portions of Scripture clearly support this truth. In particular, the apostle Paul clearly expressed this truth when he spoke to the men of Athens:
The God who made the world and all things in it, since He is Lord of heaven and earth, does not dwell in temples made with hands; nor is He served by human hands, as though He needed anything, since He Himself gives to all people life and breath and all things; and He made from one man every nation of mankind to live on all the face of the earth... (Acts 17:24-26)If every nation which has ever existed came from Adam, then Cain's wife was related to Adam in some way. Perhaps the only relative of Adam who could definitely be eliminated is Eve (for if such had occurred, it seems reasonable to assume that such an event in history would have been recorded in Genesis). Cain's wife was likely one of his sisters, but his wife also could have been the daughter of another son of Adam.
One objection to this proposal is that such a marriage has its very basis in immorality, and surely God would have provided a more moral means to multiply and fill the earth! The main reason this objection is invalid is because it makes the following assumption: that such a relationship has been immoral for all of human history.
Scripture does not support such an assumption. One example of this is that Abraham was married to Sarah, his half sister (Genesis 20:12). But such a relationship had not yet been forbidden by God. God did not prohibit such relationships until the time of Moses (Leviticus 18:9). Many argue that the reasoning behind such a command was that, by the time of Moses, the likelihood of mutations had increased to such an extent that such relationships were infeasible, an endangerment to humanity.
The City of Enoch - Genesis 4:17-19
Creation of Man - The Christian Worldview
Cain and Abel: Mark of Mercy - Genesis 4:13-16
Cain and Abel: Two Routes - Genesis 4:1-2
The First Marriage - The Christian Worldview